Here are a selection of activities for Key Stage 3 and 4 Science.
Please feel free to use them, and let me know how you get on via .

I'd best put in this disclaimer: these resources have been written in good faith, and are provided for free.
Although I can't see any way in which they could mess up your machine, I can't accept any responsibility if they do so.

Key Stage 3 and GCSE Physics Web Pages (teaching and revision) Written to enhance the textbook "Physics For You" by Keith Johnson, published by Nelson Thornes. Keith has set up a web site at www.physics4u.co.uk with extras to accompany the book.
Electromagnetic Spectrum		Energy Resources with online quizzes for each page, and exam-style questions
Radioactivity with online quizzes for each page, and exam-style questions		Under Construction: Energy, Forces and Motion