I keep some stuff here that you may find useful for students with Special Needs.

These pages have resources to assist students who may be struggling with various learning tasks. Many of the materials work well on interactive whiteboards and touchscreens. The Movement, Art, Music page has activities that are selected to entice students to engage in physical, creative multimedia activities.

Independent Supported Reading Resources: Here
Math Resources: Here
Movement, Art, Music Resources: Here

Here is perhaps the best curated selection of online "Interactive" educational activities that are sorted by learning domain by Karen Ogen:
They work well on interactive whiteboards on touchscreens, but many rely on Flash technology so they will not work too well on your iPad unless you can get the Proton or Puffin browsers.

You Tube for those who need less clutter and enhanced accessibility:
In addition to the above links, I also have resources for enhancing accessibility, and also a link to more accessible and less cluttered versions of the commonly relied on You Tube. Try this page I call YourTooby for a  less complicated, and maybe less troublesome, more accessible You Tube experience:

(Click the "Show Options" link at the top of the page and enter a search term and then click the "Get Videos" button)

This page can be navigated using the Tab key. Elements that receive the focus will play a sound file that can be used as an auditory cue to let low vision users know where the focus is. The Enter key will select the element.

Here is an excellent alternative to my YourTooby called "Accessible YouTube" from the Computer Science Department at the University of North Carolina. It is fairly self evident to use. Click the gear icon and set text-to-speech, then use Space to move the focus and Enter to make selections
I especially like how the user can scroll through the available list of videos.

New Enhanced Accessibility Web Pages:
I am now working on some ideas for a set of simple/accessible web page templates that provide text-to-speech output without having to rely on screen reader software. These pages would then offer basic accessibility using almost any device that supports a modern browser. These pages support Tab/Enter navigation of the clickable items and offer auditory cues when the highlight moves to an item that offers some kind of interactivity. Single switch navigation is possible in Windows using one of the freeware tools noted below like ClickScan. So far, the site includes a  set of demonstration pages  about Tardigrades that includes links to pages using a reworked version of my YourTooby page. Try it out here:
These pages work (mostly) in modern browsers and across platforms. Depending on the browser and/or platform you may get differing text-to-speech outcomes or qualities. On Linux systems you may need to set up a prefered text-to-speech service, or use the Linux version of the Google Chrome browser for good sounding results. 

Tools for Switch Accessibility:
 Here is a little Windows accessibility utility for your single-switch users called ClickScan that turns an adapted mouse into a more capable tool for more successfully accessing many applications and web pages- ClickScan

Here is a onscreen keyboard called ButtonBar that displays 5 buttons you can program to make applications more accessible. ButtonBar can, for example, let your user press a button and have a target somewhere else on the screen get clicked, or press a button to increase font size!  ButtonBar's buttons are also switch accessible - ButtonBar