A primary site with lots of resources to download
From STEM centre, lesson plans and resources arranged by topic area (you need to register).
BBC website – has interactive activities (good for whiteboard), quizzes and lesson plans for each QCA unit in KS1 and KS2
Four pdf files to download, with teachers notes and worksheets for KS2 science, on the topic of light
Resources from abpi – includes an animation on changing state and various pdf activities to download
Excellent ideas for demonstrations and practical work with detailed lesson plans and worksheets (from Australian TV website)