diff --git a/src/addon/mod/wiki/components/index/index.scss b/src/addon/mod/wiki/components/index/index.scss
index 9b7a2f796..49867d614 100644
--- a/src/addon/mod/wiki/components/index/index.scss
+++ b/src/addon/mod/wiki/components/index/index.scss
@@ -7,7 +7,6 @@ $addon-mod-wiki-toc-background-color: $gray-light !default;
 ion-app.app-root addon-mod-wiki-index {
     background-color: $white;
 
-    .core-tabs-content-container,
     .addon-mod_wiki-page-content {
         background-color: $white;
     }
diff --git a/src/components/chrono/chrono.ts b/src/components/chrono/chrono.ts
index 5770db45f..8783416af 100644
--- a/src/components/chrono/chrono.ts
+++ b/src/components/chrono/chrono.ts
@@ -28,7 +28,7 @@ import { Component, Input, OnChanges, OnDestroy, Output, EventEmitter, SimpleCha
  */
 @Component({
     selector: 'core-chrono',
-    template: '<span>{{ time / 1000 | coreSecondsToHMS }}</span>'
+    template: '<span role="timer">{{ time / 1000 | coreSecondsToHMS }}</span>'
 })
 export class CoreChronoComponent implements OnChanges, OnDestroy {
     @Input() running: boolean; // Set it to true to start the chrono. Set it to false to stop it.
diff --git a/src/components/context-menu/context-menu-popover.ts b/src/components/context-menu/context-menu-popover.ts
index 7aa987c24..aa468f189 100644
--- a/src/components/context-menu/context-menu-popover.ts
+++ b/src/components/context-menu/context-menu-popover.ts
@@ -26,12 +26,14 @@ import { CoreLoggerProvider } from '@providers/logger';
 })
 export class CoreContextMenuPopoverComponent {
     title: string;
+    uniqueId: string;
     items: CoreContextMenuItemComponent[];
     protected logger: any;
 
     constructor(navParams: NavParams, private viewCtrl: ViewController, logger: CoreLoggerProvider) {
         this.title = navParams.get('title');
         this.items = navParams.get('items') || [];
+        this.uniqueId = navParams.get('id');
         this.logger = logger.getInstance('CoreContextMenuPopoverComponent');
     }
 
diff --git a/src/components/context-menu/context-menu.ts b/src/components/context-menu/context-menu.ts
index 5d453384f..1f674eebd 100644
--- a/src/components/context-menu/context-menu.ts
+++ b/src/components/context-menu/context-menu.ts
@@ -16,6 +16,7 @@ import { Component, Input, OnInit, OnDestroy, ElementRef, Optional } from '@angu
 import { PopoverController } from 'ionic-angular';
 import { TranslateService } from '@ngx-translate/core';
 import { CoreDomUtilsProvider } from '@providers/utils/dom';
+import { CoreUtilsProvider } from '@providers/utils/utils';
 import { CoreContextMenuItemComponent } from './context-menu-item';
 import { CoreContextMenuPopoverComponent } from './context-menu-popover';
 import { CoreTabComponent } from '@components/tabs/tab';
@@ -34,14 +35,16 @@ export class CoreContextMenuComponent implements OnInit, OnDestroy {
 
     hideMenu = true; // It will be unhidden when items are added.
     ariaLabel: string;
+    expanded = false;
     protected items: CoreContextMenuItemComponent[] = [];
     protected itemsMovedToParent: CoreContextMenuItemComponent[] = [];
     protected itemsChangedStream: Subject<void>; // Stream to update the hideMenu boolean when items change.
     protected instanceId: string;
     protected parentContextMenu: CoreContextMenuComponent;
+    protected uniqueId: string;
 
     constructor(private translate: TranslateService, private popoverCtrl: PopoverController, elementRef: ElementRef,
-            private domUtils: CoreDomUtilsProvider, @Optional() public coreTab: CoreTabComponent) {
+            private domUtils: CoreDomUtilsProvider, @Optional() public coreTab: CoreTabComponent, utils: CoreUtilsProvider) {
         // Create the stream and subscribe to it. We ignore successive changes during 250ms.
         this.itemsChangedStream = new Subject<void>();
         this.itemsChangedStream.auditTime(250).subscribe(() => {
@@ -56,6 +59,9 @@ export class CoreContextMenuComponent implements OnInit, OnDestroy {
             });
         });
 
+        // Calculate the unique ID.
+        this.uniqueId = 'core-context-menu-' + utils.getUniqueId('CoreContextMenuComponent');
+
         this.instanceId = this.domUtils.storeInstanceByElement(elementRef.nativeElement, this);
     }
 
@@ -170,10 +176,19 @@ export class CoreContextMenuComponent implements OnInit, OnDestroy {
      * @param {MouseEvent} event Event.
      */
     showContextMenu(event: MouseEvent): void {
-        const popover = this.popoverCtrl.create(CoreContextMenuPopoverComponent, { title: this.title, items: this.items });
-        popover.present({
-            ev: event
-        });
+        if (!this.expanded) {
+            const popover = this.popoverCtrl.create(CoreContextMenuPopoverComponent,
+                { title: this.title, items: this.items, id: this.uniqueId });
+
+            popover.onDidDismiss(() => {
+                this.expanded = false;
+            });
+            popover.present({
+                ev: event
+            });
+
+            this.expanded = true;
+        }
     }
 
     /**
diff --git a/src/components/context-menu/core-context-menu-popover.html b/src/components/context-menu/core-context-menu-popover.html
index 81a1965fb..f3c0d2323 100644
--- a/src/components/context-menu/core-context-menu-popover.html
+++ b/src/components/context-menu/core-context-menu-popover.html
@@ -1,6 +1,6 @@
-<ion-list>
+<ion-list [id]="uniqueId" role="menu">
     <ion-list-header *ngIf="title">{{title}}</ion-list-header>
-    <a ion-item text-wrap *ngFor="let item of items" core-link [capture]="item.captureLink" [autoLogin]="item.autoLogin" [href]="item.href" (click)="itemClicked($event, item)" [attr.aria-label]="item.ariaAction" [hidden]="item.hidden" [attr.detail-none]="!item.href || item.iconAction">
+    <a ion-item text-wrap *ngFor="let item of items" core-link [capture]="item.captureLink" [autoLogin]="item.autoLogin" [href]="item.href" (click)="itemClicked($event, item)" [attr.aria-label]="item.ariaAction" [hidden]="item.hidden" [attr.detail-none]="!item.href || item.iconAction" role="menuitem" [attr.aria-controls]="uniqueId">
         <core-icon *ngIf="item.iconDescription" [name]="item.iconDescription" [attr.aria-label]="item.ariaDescription" item-start></core-icon>
         <core-format-text [clean]="true" [text]="item.content"></core-format-text>
         <core-icon *ngIf="(item.href || item.action) && item.iconAction && item.iconAction != 'spinner'" [name]="item.iconAction" item-end></core-icon>
diff --git a/src/components/context-menu/core-context-menu.html b/src/components/context-menu/core-context-menu.html
index 262bb3256..0628573be 100644
--- a/src/components/context-menu/core-context-menu.html
+++ b/src/components/context-menu/core-context-menu.html
@@ -1,4 +1,4 @@
-<button [hidden]="hideMenu" ion-button clear icon-only [attr.aria-label]="ariaLabel" (click)="showContextMenu($event)" class="bar-button">
+<button [hidden]="hideMenu" ion-button clear icon-only [attr.aria-label]="ariaLabel" (click)="showContextMenu($event)" class="bar-button" aria-haspopup="true" [attr.aria-expanded]="expanded" [attr.aria-controls]="uniqueId">
     <core-icon [name]="icon"></core-icon>
 </button>
 <ng-content></ng-content>
\ No newline at end of file
diff --git a/src/components/icon/core-icon.html b/src/components/icon/core-icon.html
index 8e4a85f3a..54452fe8f 100644
--- a/src/components/icon/core-icon.html
+++ b/src/components/icon/core-icon.html
@@ -1 +1 @@
-<ion-icon [name]="name" [isActive]="isActive" [md]="md" [ios]="ios" [color]="color"></ion-icon>
\ No newline at end of file
+<ion-icon [name]="name" [isActive]="isActive" [md]="md" [ios]="ios" [color]="color" aria-hidden="true" role="presentation"></ion-icon>
\ No newline at end of file
diff --git a/src/components/icon/icon.ts b/src/components/icon/icon.ts
index 8171e018f..50351f582 100644
--- a/src/components/icon/icon.ts
+++ b/src/components/icon/icon.ts
@@ -54,6 +54,8 @@ export class CoreIconComponent implements OnInit, OnDestroy {
             this.newElement.classList.add('icon');
             this.newElement.classList.add('fa');
             this.newElement.classList.add(this.name);
+            this.newElement.setAttribute('aria-hidden', 'true');
+            this.newElement.setAttribute('role', 'img');
             if (this.isTrueProperty(this.fixedWidth)) {
                 this.newElement.classList.add('fa-fw');
             }
diff --git a/src/components/input-errors/core-input-errors.html b/src/components/input-errors/core-input-errors.html
index e960807e8..62ab3df6a 100644
--- a/src/components/input-errors/core-input-errors.html
+++ b/src/components/input-errors/core-input-errors.html
@@ -12,5 +12,5 @@
             </div>
         </ng-container>
     </ng-container>
-    <div *ngIf="errorText" class="core-input-error">{{ errorText }}</div>
+    <div *ngIf="errorText" class="core-input-error" aria-live="assertive">{{ errorText }}</div>
 </div>
\ No newline at end of file
diff --git a/src/components/ion-tabs/core-ion-tabs.html b/src/components/ion-tabs/core-ion-tabs.html
index c3e62e9e6..d4276f461 100644
--- a/src/components/ion-tabs/core-ion-tabs.html
+++ b/src/components/ion-tabs/core-ion-tabs.html
@@ -1,5 +1,5 @@
-<div class="tabbar" role="tablist" #tabbar [hidden]="hidden">
-    <a [hidden]="_loaded === false" *ngFor="let t of _tabs" [tab]="t" class="tab-button" role="tab" href="#" (ionSelect)="select(t)"></a>
+<div class="tabbar" role="tablist" #tabbar>
+    <a [hidden]="_loaded === false" *ngFor="let t of _tabs" [tab]="t" class="tab-button" role="tab" href="#" (ionSelect)="select(t)" [attr.aria-hidden]="!t.show" [attr.aria-label]="t.tabTitle || ''"></a>
     <div class="tab-highlight"></div>
     <div *ngIf="_loaded === false" class="core-ion-tabs-loading">
         <span class="core-ion-tabs-loading-spinner">
diff --git a/src/components/loading/core-loading.html b/src/components/loading/core-loading.html
index 0e34fe572..c149e9bf1 100644
--- a/src/components/loading/core-loading.html
+++ b/src/components/loading/core-loading.html
@@ -1,10 +1,10 @@
-<div [@coreShowHideAnimation] class="core-loading-container" *ngIf="!hideUntil">
+<div [@coreShowHideAnimation] class="core-loading-container" *ngIf="!hideUntil" role="status">
     <span class="core-loading-spinner">
         <ion-spinner></ion-spinner>
-        <p class="core-loading-message" *ngIf="message">{{message}}</p>
+        <p class="core-loading-message" *ngIf="message" role="status">{{message}}</p>
     </span>
 </div>
-<div #content class="core-loading-content" [id]="uniqueId">
+<div #content class="core-loading-content" [id]="uniqueId" [attr.aria-busy]="hideUntil">
     <ng-content [@coreShowHideAnimation] *ngIf="hideUntil">
     </ng-content>
 </div>
\ No newline at end of file
diff --git a/src/components/progress-bar/core-progress-bar.html b/src/components/progress-bar/core-progress-bar.html
index 7c7319034..d024ba4b8 100644
--- a/src/components/progress-bar/core-progress-bar.html
+++ b/src/components/progress-bar/core-progress-bar.html
@@ -1,5 +1,5 @@
 <div *ngIf="progress >= 0">
-    <progress max="100" [value]="progress">
+    <progress max="100" [value]="progress" role="progressbar" aria-valuemin="0" aria-valuemax="100" [attr.aria-valuenow]="progress">
         <div class="progress-bar-fallback" role="progressbar" aria-valuemin="0" aria-valuemax="100" [attr.aria-valuenow]="progress">
             <span [style.width]="width"></span>
         </div>
diff --git a/src/components/rich-text-editor/core-rich-text-editor.html b/src/components/rich-text-editor/core-rich-text-editor.html
index 972fe0c0c..7a02610dd 100644
--- a/src/components/rich-text-editor/core-rich-text-editor.html
+++ b/src/components/rich-text-editor/core-rich-text-editor.html
@@ -1,5 +1,5 @@
 <div [hidden]="!rteEnabled">
-    <div #editor contenteditable="true" class="core-rte-editor" tappable [attr.data-placeholder-text]="placeholder">
+    <div #editor contenteditable="true" class="core-rte-editor" tappable [attr.data-placeholder-text]="placeholder" role="textbox">
     </div>
 
     <!-- https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand -->
@@ -22,7 +22,7 @@
 </div>
 
 <div [hidden]="rteEnabled">
-    <ion-textarea #textarea class="core-textarea" [placeholder]="placeholder" [attr.name]="name" ngControl="control" (ionChange)="onChange($event)"></ion-textarea>
+    <ion-textarea #textarea class="core-textarea" [placeholder]="placeholder" [attr.name]="name" ngControl="control" (ionChange)="onChange($event)" role="textbox"></ion-textarea>
     <div class="core-rte-toolbar" [hidden]="!editorSupported">
         <div #decorate class="core-rte-buttons">
             <button tappable [core-suppress-events] (onClick)="toggleEditor($event)"><core-icon name="fa-pencil-square-o"></core-icon> {{ 'core.vieweditor' | translate }}</button>
diff --git a/src/components/search-box/core-search-box.html b/src/components/search-box/core-search-box.html
index 7712caf71..260d45215 100644
--- a/src/components/search-box/core-search-box.html
+++ b/src/components/search-box/core-search-box.html
@@ -1,7 +1,7 @@
 <ion-card>
-    <form #f="ngForm" (ngSubmit)="submitForm($event)">
+    <form #f="ngForm" (ngSubmit)="submitForm($event)" role="search">
         <ion-item>
-            <ion-input type="text" name="search" [(ngModel)]="searchText" [placeholder]="placeholder" [autocorrect]="autocorrect" [spellcheck]="spellcheck" [core-auto-focus]="autoFocus" [disabled]="disabled"></ion-input>
+            <ion-input type="search" name="search" [(ngModel)]="searchText" [placeholder]="placeholder" [autocorrect]="autocorrect" [spellcheck]="spellcheck" [core-auto-focus]="autoFocus" [disabled]="disabled" role="searchbox"></ion-input>
             <button item-end ion-button clear icon-only type="submit" class="button-small" [attr.aria-label]="searchLabel" [disabled]="!searchText || (searchText.length < lengthCheck)" [disabled]="disabled">
                 <ion-icon name="search"></ion-icon>
             </button>
diff --git a/src/components/send-message-form/core-send-message-form.html b/src/components/send-message-form/core-send-message-form.html
index f02a7ee2c..b1829854a 100644
--- a/src/components/send-message-form/core-send-message-form.html
+++ b/src/components/send-message-form/core-send-message-form.html
@@ -1,5 +1,5 @@
 <form>
-    <textarea class="core-send-message-input" [core-auto-focus]="showKeyboard" [placeholder]="placeholder" rows="1" core-auto-rows [(ngModel)]="message" name="message" (onResize)="textareaResized()" (keydown.enter)="enterClicked($event)" (keydown.control.enter)="enterClicked($event, 'control')" (keydown.meta.enter)="enterClicked($event, 'meta')"></textarea>
+    <textarea class="core-send-message-input" [core-auto-focus]="showKeyboard" [placeholder]="placeholder" rows="1" core-auto-rows [(ngModel)]="message" name="message" (onResize)="textareaResized()" (keydown.enter)="enterClicked($event)" (keydown.control.enter)="enterClicked($event, 'control')" (keydown.meta.enter)="enterClicked($event, 'meta')" aria-multiline="true"></textarea>
     <ion-buttons end>
         <button ion-button icon-only clear="true" type="submit" [disabled]="!message" [attr.aria-label]="'core.send' | translate" [core-suppress-events] (onClick)="submitForm($event)">
             <ion-icon name="send" color="dark"></ion-icon>
diff --git a/src/components/tabs/core-tabs.html b/src/components/tabs/core-tabs.html
index 5799c09bd..977b8899e 100644
--- a/src/components/tabs/core-tabs.html
+++ b/src/components/tabs/core-tabs.html
@@ -1,23 +1,21 @@
 <core-loading [hideUntil]="hideUntil" class="core-loading-center">
-    <div class="core-tabs-bar" #topTabs [hidden]="!tabs || numTabsShown < 2">
+    <div class="core-tabs-bar" #topTabs [hidden]="!tabs || numTabsShown < 2" id="core-tabs-bar">
         <ion-row>
-            <ion-col class="col-with-arrow" (click)="slidePrev()" no-padding col-1>
+            <ion-col class="col-with-arrow" (click)="slidePrev()" no-padding col-1 aria-hidden="true">
                 <ion-icon *ngIf="showPrevButton" name="arrow-back" md="ios-arrow-back"></ion-icon>
             </ion-col>
             <ion-col no-padding col-10>
-                <ion-slides (ionSlideDidChange)="slideChanged()" [slidesPerView]="slidesShown" [dir]="direction">
+                <ion-slides (ionSlideDidChange)="slideChanged()" [slidesPerView]="slidesShown" [dir]="direction" role="tablist" [attr.aria-label]="description" aria-hidden="false">
                     <ng-container *ngFor="let tab of tabs; let idx = index">
-                        <ion-slide *ngIf="tab.show">
-                            <a [attr.aria-selected]="selected == idx" (click)="selectTab(idx)" class="tab-slide">
-                                <core-icon *ngIf="tab.icon" [name]="tab.icon"></core-icon>
-                                <span *ngIf="tab.title">{{ tab.title }}</span>
-                                <ion-badge *ngIf="tab.badge" [color]="tab.badgeStyle" class="tab-badge">{{tab.badge}}</ion-badge>
-                            </a>
+                       <ion-slide *ngIf="tab.show" [attr.aria-selected]="selected == idx" (click)="selectTab(idx)" class="tab-slide" [attr.aria-label]="tab.title || ''" role="tab" [attr.aria-controls]="tab.id" [id]="tab.id + '-tab'" [tabindex]="selected == idx ? null : -1">
+                            <core-icon *ngIf="tab.icon" [name]="tab.icon"></core-icon>
+                            <div *ngIf="tab.title">{{ tab.title }}</div>
+                            <ion-badge *ngIf="tab.badge" [color]="tab.badgeStyle" class="tab-badge">{{tab.badge}}</ion-badge>
                         </ion-slide>
                     </ng-container>
                 </ion-slides>
             </ion-col>
-            <ion-col class="col-with-arrow" (click)="slideNext()" no-padding col-1>
+            <ion-col class="col-with-arrow" (click)="slideNext()" no-padding col-1 aria-hidden="true">
                 <ion-icon *ngIf="showNextButton" name="arrow-forward" md="ios-arrow-forward"></ion-icon>
             </ion-col>
         </ion-row>
diff --git a/src/components/tabs/tab.ts b/src/components/tabs/tab.ts
index b4d8cbae9..e65068f8f 100644
--- a/src/components/tabs/tab.ts
+++ b/src/components/tabs/tab.ts
@@ -16,6 +16,7 @@ import { Component, Input, Output, OnInit, OnDestroy, ElementRef, EventEmitter,
 import { CoreTabsComponent } from './tabs';
 import { Content } from 'ionic-angular';
 import { CoreDomUtilsProvider } from '@providers/utils/dom';
+import { CoreUtilsProvider } from '@providers/utils/utils';
 import { CoreNavBarButtonsComponent } from '../navbar-buttons/navbar-buttons';
 
 /**
@@ -54,6 +55,9 @@ export class CoreTabComponent implements OnInit, OnDestroy {
 
             if (this.initialized && hasChanged) {
                 this.tabs.tabVisibilityChanged();
+
+                this.tabElement = document.getElementById(this.id + '-tab');
+                this.tabElement && this.tabElement.setAttribute('aria-hidden', !this._show);
             }
         }
     }
@@ -70,17 +74,31 @@ export class CoreTabComponent implements OnInit, OnDestroy {
     loaded = false;
     initialized = false;
     _show = true;
+    tabElement: any;
 
-    constructor(protected tabs: CoreTabsComponent, element: ElementRef, protected domUtils: CoreDomUtilsProvider) {
+    constructor(protected tabs: CoreTabsComponent, element: ElementRef, protected domUtils: CoreDomUtilsProvider,
+            utils: CoreUtilsProvider) {
         this.element = element.nativeElement;
+
+        this.element.setAttribute('role', 'tabpanel');
+        this.element.setAttribute('tabindex', '0');
+        this.id = this.id || 'core-tab-' + utils.getUniqueId('CoreTabComponent');
     }
 
     /**
      * Component being initialized.
      */
     ngOnInit(): void {
+        this.element.setAttribute('aria-labelledby', this.id + '-tab');
+        this.element.setAttribute('id', this.id);
+
         this.tabs.addTab(this);
         this.initialized = true;
+
+        setTimeout(() => {
+            this.tabElement = document.getElementById(this.id + '-tab');
+            this.tabElement && this.tabElement.setAttribute('aria-hidden', !this._show);
+        }, 1000);
     }
 
     /**
@@ -96,6 +114,11 @@ export class CoreTabComponent implements OnInit, OnDestroy {
     selectTab(): void {
         this.element.classList.add('selected');
 
+        this.tabElement = this.tabElement || document.getElementById(this.id + '-tab');
+
+        this.tabElement && this.tabElement.setAttribute('aria-selected', true);
+        this.tabElement && this.tabElement.setAttribute('aria-hidden', !this._show);
+
         this.loaded = true;
         this.ionSelect.emit(this);
         this.showHideNavBarButtons(true);
@@ -114,6 +137,9 @@ export class CoreTabComponent implements OnInit, OnDestroy {
      * Unselect tab.
      */
     unselectTab(): void {
+        this.tabElement && this.tabElement.setAttribute('aria-selected', false);
+        this.tabElement && this.tabElement.setAttribute('aria-hidden', true);
+
         this.element.classList.remove('selected');
         this.showHideNavBarButtons(false);
     }
diff --git a/src/components/tabs/tabs.scss b/src/components/tabs/tabs.scss
index 4c2cfc506..d20bee9de 100644
--- a/src/components/tabs/tabs.scss
+++ b/src/components/tabs/tabs.scss
@@ -10,19 +10,20 @@ ion-app.app-root .core-tabs-bar {
         width: 100%;
     }
 
-    a.tab-slide {
+    ion-slide.tab-slide {
         @extend .tab-button;
 
         background: $core-top-tabs-background;
         color: $core-top-tabs-color !important;
         font-size: 1.6rem;
-        border: 0;
-        padding: 0 5px 0 5px !important;
+        border-bottom: 2px solid transparent !important;
+        padding: 0 2px 0 2px !important;
         margin: 0 auto !important;
         display: flex;
-        flex-direction: row;
+        flex: none;
+        min-width: 100px;
 
-        span {
+        div {
             text-overflow: ellipsis;
             white-space: nowrap;
             overflow: hidden;
@@ -44,9 +45,12 @@ ion-app.app-root .core-tabs-bar {
 
         &[aria-selected=true] {
             color: $core-top-tabs-color-active !important;
-            border: 0 !important;
-            border-bottom: 2px solid $core-top-tabs-border-active !important;
-            padding: 0 !important;
+            border-bottom-color: $core-top-tabs-border-active !important;
+        }
+
+        .slide-zoom {
+            display: flex;
+            flex-direction: column;
         }
     }
 
@@ -64,7 +68,7 @@ ion-app.app-root .core-tabs-bar {
     }
 }
 
-ion-app.app-root.md .core-tabs-bar a.tab-slide {
+ion-app.app-root.md .core-tabs-bar ion-slide.tab-slide {
     // @extend .tabs-md .tab-button;
     min-height: $tabs-md-tab-min-height;
 
@@ -72,7 +76,7 @@ ion-app.app-root.md .core-tabs-bar a.tab-slide {
     color: $tabs-md-tab-text-color;
 }
 
-ion-app.app-root.ios .core-tabs-bar a.tab-slide {
+ion-app.app-root.ios .core-tabs-bar ion-slide.tab-slide {
     // @extend .tabs-ios .tab-button;
     max-width: $tabs-ios-tab-max-width;
     min-height: $tabs-ios-tab-min-height;
@@ -82,7 +86,7 @@ ion-app.app-root.ios .core-tabs-bar a.tab-slide {
     color: $tabs-ios-tab-text-color;
 }
 
-ion-app.app-root.wp .core-tabs-bar a.tab-slide {
+ion-app.app-root.wp .core-tabs-bar ion-slide.tab-slide {
     //@extend .tabs-wp .tab-button;
     @include border-radius(0);
 
@@ -124,6 +128,7 @@ ion-app.app-root core-tabs {
         display: none;
         height: 100%;
         position: relative;
+        z-index: 1;
 
         &.selected {
             display: block;
diff --git a/src/components/tabs/tabs.ts b/src/components/tabs/tabs.ts
index 1e38c3cd8..042f727fd 100644
--- a/src/components/tabs/tabs.ts
+++ b/src/components/tabs/tabs.ts
@@ -62,6 +62,7 @@ export class CoreTabsComponent implements OnInit, AfterViewInit, OnChanges, OnDe
     slidesShown = this.maxSlides;
     numTabsShown = 0;
     direction = 'ltr';
+    description = '';
 
     protected originalTabsContainer: HTMLElement; // The container of the original tabs. It will include each tab's content.
     protected initialized = false;
@@ -238,8 +239,8 @@ export class CoreTabsComponent implements OnInit, AfterViewInit, OnChanges, OnDe
     /**
      * Get the index of tab.
      *
-     * @param  {any}    tab [description]
-     * @return {number}     [description]
+     * @param  {any}    tab Tab object to check.
+     * @return {number}     Index number on the tabs array or -1 if not found.
      */
     getIndex(tab: any): number {
         for (let i = 0; i < this.tabs.length; i++) {
diff --git a/src/components/timer/core-timer.html b/src/components/timer/core-timer.html
index 03c48900c..729a8803e 100644
--- a/src/components/timer/core-timer.html
+++ b/src/components/timer/core-timer.html
@@ -1,5 +1,5 @@
-<ion-item #container class="core-timer" [attr.text-center]="align == 'center' ? true : null" [attr.text-end]="align == 'right' ? true : null">
-    <ion-icon name="timer" item-start></ion-icon>
+<ion-item #container class="core-timer" [attr.text-center]="align == 'center' ? true : null" [attr.text-end]="align == 'right' ? true : null" role="timer">
+    <ion-icon name="timer" item-start role="presentation"></ion-icon>
     <label *ngIf="timeLeft > 0 && timerText">{{ timerText }}</label>
     <span *ngIf="timeLeft > 0">{{ timeLeft | coreSecondsToHMS }}</span>
     <span class="core-timesup" *ngIf="timeLeft <= 0">{{ 'core.timesup' | translate }}</span>
diff --git a/src/core/course/components/format/core-course-format.html b/src/core/course/components/format/core-course-format.html
index 687f76937..30ae329e3 100644
--- a/src/core/course/components/format/core-course-format.html
+++ b/src/core/course/components/format/core-course-format.html
@@ -11,7 +11,7 @@
         <!-- Section selector. -->
         <core-dynamic-component [component]="sectionSelectorComponent" [data]="data">
             <div text-wrap *ngIf="displaySectionSelector && sections && sections.length" padding class="clearfix" ion-row justify-content-between class="safe-padding-horizontal">
-                <button float-start ion-button icon-start icon-end (click)="showSectionSelector($event)" color="light" class="core-button-select button-no-uppercase" ion-col>
+                <button float-start ion-button icon-start icon-end (click)="showSectionSelector($event)" color="light" class="core-button-select button-no-uppercase" ion-col [attr.aria-label]="('core.course.sections' | translate) + ': ' + (selectedSection && (selectedSection.formattedName || selectedSection.name))" aria-haspopup="true" [attr.aria-expanded]="sectionSelectorExpanded" aria-controls="core-course-section-selector" id="core-course-section-button">
                     <core-icon name="fa-folder"></core-icon>
                     <span class="core-section-selector-text">{{selectedSection && (selectedSection.formattedName || selectedSection.name) || 'core.course.sections' | translate }}</span>
                     <ion-icon name="arrow-dropdown" ios="md-arrow-dropdown"></ion-icon>
diff --git a/src/core/course/components/format/format.ts b/src/core/course/components/format/format.ts
index 10ffa511e..6cbf059e0 100644
--- a/src/core/course/components/format/format.ts
+++ b/src/core/course/components/format/format.ts
@@ -61,6 +61,7 @@ export class CoreCourseFormatComponent implements OnInit, OnChanges, OnDestroy {
     allSectionsComponent: any;
     canLoadMore = false;
     showSectionId = 0;
+    sectionSelectorExpanded = false;
 
     // Data to pass to the components.
     data: any = {};
@@ -243,16 +244,27 @@ export class CoreCourseFormatComponent implements OnInit, OnChanges, OnDestroy {
 
     /**
      * Display the section selector modal.
+     *
+     * @param {MouseEvent} event Event.
      */
-    showSectionSelector(): void {
-        const modal = this.modalCtrl.create('CoreCourseSectionSelectorPage',
-            {course: this.course, sections: this.sections, selected: this.selectedSection});
-        modal.onDidDismiss((newSection) => {
-            if (newSection) {
-                this.sectionChanged(newSection);
-            }
-        });
-        modal.present();
+    showSectionSelector(event: MouseEvent): void {
+        if (!this.sectionSelectorExpanded) {
+            const modal = this.modalCtrl.create('CoreCourseSectionSelectorPage',
+                {course: this.course, sections: this.sections, selected: this.selectedSection});
+            modal.onDidDismiss((newSection) => {
+                if (newSection) {
+                    this.sectionChanged(newSection);
+                }
+
+                this.sectionSelectorExpanded = false;
+            });
+
+            modal.present({
+                ev: event
+            });
+
+            this.sectionSelectorExpanded = true;
+        }
     }
 
     /**
diff --git a/src/core/course/components/module/core-course-module.html b/src/core/course/components/module/core-course-module.html
index eb405cbd6..af880f447 100644
--- a/src/core/course/components/module/core-course-module.html
+++ b/src/core/course/components/module/core-course-module.html
@@ -1,6 +1,6 @@
 <a *ngIf="module && module.visibleoncoursepage !== 0" ion-item text-wrap id="core-course-module-{{module.id}}" class="core-course-module-handler {{module.handlerData.class}}" (click)="moduleClicked($event)" [ngClass]="{'item-media': module.handlerData.icon, 'core-not-clickable': !module.handlerData.action || !module.uservisible === false, 'item-dimmed': module.visible === 0 || module.uservisible === false}" [title]="module.handlerData.a11yTitle" detail-none>
 
-    <img item-start *ngIf="module.handlerData.icon" [src]="module.handlerData.icon" alt="" role="presentation" class="core-module-icon">
+    <img item-start *ngIf="module.handlerData.icon" [src]="module.handlerData.icon" [alt]="module.modnametranslated" class="core-module-icon">
     <div class="core-module-title">
         <core-format-text [text]="module.handlerData.title"></core-format-text>
 
diff --git a/src/core/course/components/module/module.ts b/src/core/course/components/module/module.ts
index ea0fb47bd..a22125152 100644
--- a/src/core/course/components/module/module.ts
+++ b/src/core/course/components/module/module.ts
@@ -18,6 +18,7 @@ import { CoreEventsProvider } from '@providers/events';
 import { CoreSitesProvider } from '@providers/sites';
 import { CoreDomUtilsProvider } from '@providers/utils/dom';
 import { CoreCourseHelperProvider } from '../../providers/helper';
+import { CoreCourseProvider } from '../../providers/course';
 import { CoreCourseModuleHandlerButton } from '../../providers/module-delegate';
 import { CoreCourseModulePrefetchDelegate, CoreCourseModulePrefetchHandler } from '../../providers/module-prefetch-delegate';
 import { CoreConstants } from '../../../constants';
@@ -63,7 +64,8 @@ export class CoreCourseModuleComponent implements OnInit, OnDestroy {
 
     constructor(@Optional() protected navCtrl: NavController, protected prefetchDelegate: CoreCourseModulePrefetchDelegate,
             protected domUtils: CoreDomUtilsProvider, protected courseHelper: CoreCourseHelperProvider,
-            protected eventsProvider: CoreEventsProvider, protected sitesProvider: CoreSitesProvider) {
+            protected eventsProvider: CoreEventsProvider, protected sitesProvider: CoreSitesProvider,
+            protected courseProvider: CoreCourseProvider) {
         this.completionChanged = new EventEmitter();
     }
 
@@ -97,6 +99,8 @@ export class CoreCourseModuleComponent implements OnInit, OnDestroy {
 
         this.module.handlerData.a11yTitle = typeof this.module.handlerData.a11yTitle != 'undefined' ?
             this.module.handlerData.a11yTitle : this.module.handlerData.title;
+
+        this.module.modnametranslated = this.courseProvider.translateModuleName(this.module.modname) || '';
     }
 
     /**
diff --git a/src/core/course/pages/section-selector/section-selector.html b/src/core/course/pages/section-selector/section-selector.html
index 93d3d8184..e160fa1f6 100644
--- a/src/core/course/pages/section-selector/section-selector.html
+++ b/src/core/course/pages/section-selector/section-selector.html
@@ -9,13 +9,15 @@
     </ion-navbar>
 </ion-header>
 <ion-content>
-    <ng-container *ngFor="let section of sections">
-        <a ion-item *ngIf="!section.hiddenbynumsections && section.id != stealthModulesSectionId" text-wrap (click)="selectSection(section)" [class.core-primary-selected-item]="selected.id == section.id" [class.item-dimmed]="section.visible === 0 || section.uservisible === false" detail-none>
-            <core-icon name="fa-folder" item-start></core-icon>
-            <h2><core-format-text [text]="section.formattedName || section.name"></core-format-text></h2>
-            <core-progress-bar *ngIf="section.progress >= 0" [progress]="section.progress"></core-progress-bar>
-            <ion-badge color="secondary" *ngIf="section.visible === 0 && section.uservisible !== false">{{ 'core.course.hiddenfromstudents' | translate }}</ion-badge>
-            <ion-badge color="secondary" *ngIf="section.availabilityinfo"><core-format-text  [text]=" section.availabilityinfo"></core-format-text></ion-badge>
-        </a>
-    </ng-container>
+    <ion-list id="core-course-section-selector" role="menu" aria-labelledby="core-course-section-button">
+        <ng-container *ngFor="let section of sections">
+            <a ion-item *ngIf="!section.hiddenbynumsections && section.id != stealthModulesSectionId" text-wrap (click)="selectSection(section)" [class.core-primary-selected-item]="selected.id == section.id" [class.item-dimmed]="section.visible === 0 || section.uservisible === false" detail-none role="menuitem" [attr.aria-hidden]="section.uservisible === false" [attr.aria-label]="section.formattedName || section.name">
+                <core-icon name="fa-folder" item-start></core-icon>
+                <h2><core-format-text [text]="section.formattedName || section.name"></core-format-text></h2>
+                <core-progress-bar *ngIf="section.progress >= 0" [progress]="section.progress"></core-progress-bar>
+                <ion-badge color="secondary" *ngIf="section.visible === 0 && section.uservisible !== false" text-wrap>{{ 'core.course.hiddenfromstudents' | translate }}</ion-badge>
+                <ion-badge color="secondary" *ngIf="section.availabilityinfo" text-wrap><core-format-text  [text]=" section.availabilityinfo"></core-format-text></ion-badge>
+            </a>
+        </ng-container>
+    </ion-list>
 </ion-content>
diff --git a/src/core/course/pages/section-selector/section-selector.scss b/src/core/course/pages/section-selector/section-selector.scss
index a5f45cbdc..c35e93f93 100644
--- a/src/core/course/pages/section-selector/section-selector.scss
+++ b/src/core/course/pages/section-selector/section-selector.scss
@@ -8,4 +8,8 @@ ion-app.app-root page-core-course-section-selector {
             margin: 8px 0 4px 0;
         }
     }
+
+    ion-badge {
+        text-align: left;
+    }
 }
\ No newline at end of file
diff --git a/src/core/mainmenu/pages/more/more.html b/src/core/mainmenu/pages/more/more.html
index 5db8aa669..02e3ec7d6 100644
--- a/src/core/mainmenu/pages/more/more.html
+++ b/src/core/mainmenu/pages/more/more.html
@@ -30,19 +30,19 @@
             </a>
         </div>
         <a *ngIf="showWeb" ion-item [href]="siteInfo.siteurl" core-link autoLogin="yes" title="{{ 'core.mainmenu.website' | translate }}">
-            <ion-icon name="globe" item-start></ion-icon>
+            <ion-icon name="globe" item-start aria-hidden="true"></ion-icon>
             <p>{{ 'core.mainmenu.website' | translate }}</p>
         </a>
         <a *ngIf="showHelp" ion-item [href]="docsUrl" core-link autoLogin="no" title="{{ 'core.mainmenu.help' | translate }}">
-            <ion-icon name="help-buoy" item-start></ion-icon>
+            <ion-icon name="help-buoy" item-start aria-hidden="true"></ion-icon>
             <p>{{ 'core.mainmenu.help' | translate }}</p>
         </a>
         <a ion-item (click)="openSettings()" title="{{ 'core.mainmenu.appsettings' | translate }}">
-            <ion-icon name="cog" item-start></ion-icon>
+            <ion-icon name="cog" item-start aria-hidden="true"></ion-icon>
             <p>{{ 'core.mainmenu.appsettings' | translate }}</p>
         </a>
         <a ion-item (click)="logout()" title="{{ logoutLabel | translate }}">
-            <ion-icon name="log-out" item-start></ion-icon>
+            <ion-icon name="log-out" item-start aria-hidden="true"></ion-icon>
             <p>{{ logoutLabel | translate }}</p>
         </a>
     </ion-list>