A superb Apple and Android app from IFTTT which lets you setup one click notes which can be used for many online services. You can send a note to your email, add something to Evernote, or even add something to your Google Calendar by extracting the details from the text. Use it in your ongoing assessment by quickly noting things you notice in class.
A great citizen science site where users can upload and view photos of animals or use the free Apple device and Android Apps. It's a great way to do real science with what you already have in class. Check out the education section for more ideas.
http://ictmagic.wikispaces.com/Science
A great eco Apple/Android app featuring a polar bear. With plenty of games and environmental lessons, it is a good resource for helping your pupils go green.
A great random workout generator. Choose the type of exercise and set the timer between 5-60 minutes. This could be used as a 5 minute challenge in a sports lesson. The site works well on mobile devices, but there are apps for Apple and Android devices to download.
http://ictmagic.wikispaces.com/Sports+%26+Fitness
This is a fab suite of programming tools and toys from Microsoft Research. The site using HTML 5 which means that it works across most devices from PCs, Apple, Android and more. It has a get tutorial section to get you started and you are able to pick apart coding from other public projects. You can share your finished scripts and programmes with a link to play on most devices and even export it to the Windows Store.
http://ictmagic.wikispaces.com/ICT+%26+Web+Tools
