Interactive multiple choice quizzes for Key Stage 3 biology chemistry and physics, from the Animated Science blog.
Collection of multiple choice quizzes for various year 7 and year 8 units.
BBC site with notes and tests for KS3 SATs
A selection from Andy Darvills science site – includes digestion, space, reproduction, cells etc.
Wordsearches, hangman etc. for different KS3 topics.
Online word guessing game with key words for lots of KS3 science topics.