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

http://kent.skoool.co.uk/keystage4.aspx?id=314