Tried and tested.

*English and Maths Apps

Clare BrownHead of English and MathsCity College Plymouth

* My Script Calculator

*http://www.youtube.com/watch?feature=player_detailpage&v=e3JiRAiX7X

*Revise

*https://play.google.com/store/apps/details?id=com.schoolrevisionapps.mice

* British Council Grammar

*http://www.youtube.com/watch?v=rCQhWpdcPoU

Edexcel Past Papers

http://www.youtube.com/watch?v=rCQhWpdcPoU

*Grammar Up

Grammar uphttp://www.youtube.com/watch?v=UUbxwU97nws

*King of Math

*http://www.youtube.com/watch?v=Ec0eLNw9TDI

*My Script Math Pad

*http://www.youtube.com/watch?v=K0PHCdq5CKE