Working in Tower Hamlets over the years, amongst other things, we have recommended software for PCs & laptops, apps for iPads & Android devices and more recently resources available for chrome books.
Chrome books are a budget friendly and portable computing option. They use Google Chrome operating system and are designed to be connected to the Internet. They’re an ideal choice if you use mainly browser-based apps.
Chrome books switch on quickly, automatically update and come in various sizes. Their versatility for SEND relies on useful and engaging web apps. Chromebooks have built-in accessibility options that can be adjusted to suit individual needs and have USB ports that allow a variety of assistive devices to be connected. Overall, the accessibility options are quite good, though there won’t be a solution for everybody. In addition to the built-in features of Chrome OS, the Chromebook can use Apps and Extensions to enhance access. Apps are individual, web-based programs and activities, while Extensions provide enhancements to Chrome OS working across a range of web pages and apps, in the same way that extensions add functionality to some other web browsers. Here is a guide to using Accessibility Options on chromebooks from www.callscotland.org.uk
A lot of software that once had to be loaded onto networks is now available online. You can now find Word shark online and the much-loved 2Simple software you can now find on their online primary software suite PurpleMash.
All schools have got different systems for making devices available to children. Many schools no longer have ICT suites but use trolleys of devices that can be wheeled around to different classrooms. For ordinary curriculum purposes this is a great idea but some children (particularly those with SEND) need to have a device available to them for their exclusive use at any time.
Schools have got different systems in place for the devices made available to children with SEND. 
The system needs to be efficient and needs to consider the geography of the building, the whereabouts of the SEND students and keeping the devices charged and ready for use as needed. If you are using iPads and chromebooks it’s vital that your school has efficient Wi-Fi.
One of the disadvantages of a chrome book is that you cannot load special SEND software like Clicker 7 or Dragon “Naturally Speaking” onto it. So if you have a particular need, you have to hope that there is a chromebook app or extension that will provide for that need. As far as “speech to text” software goes (like the Dragon software) the problem is solved by Google incorporating Voice Typing as a tool on Google Docs. As far a Clicker is concerned Cricksoft have created Clicker apps for chrome books.
The Clicker apps for chrome book are the same as those for iPad however the pricing is different being. Clicker Apps for chromebook cost £30 for a years subscription for one app and then various degrees of pricing for site licenses. To find out more look at cricksoft.com/uk/clicker/chromebook
Here is a list of Chromebook apps and extensions that can be used by learners with Dyslexia