If you have access to wireless connection/laptop/interactive whiteboard….here is an excellent resource area for you….for both KS3 and KS4!
Just hook up your laptop + wireless connection and your interactive whiteboard….and yoiu have (almost) instant lessons…..and interesting,engaging ones …..!!
Can also be accessed at home…by students and teachers.
http://kent.skoool.co.uk/index.aspx
KS3 Science
http://kent.skoool.co.uk/keystage3.aspx?id=80
KS4 Science