The Institute of Physics offers resources for teaching advanced physics:

“Welcome to Teaching Advanced Physics (TAP). This website contains detailed ideas and resources for teaching physics to students aged 16-19. The site aims to help those new to teaching this age group, and assumes only a limited access to equipment, to resources, and to advice from experienced colleagues.”

I’m teaching a bacis course of physics in 11th grade for the first time at the moment and am checking out their material regarding mechanics as it is the the current subject in my course. I try to have the students do experiments every week (unlike in the US, German schools have different timetables every day; my course consists of three lessons per week, a single one on Tuesdays and a double lesson on Thursdays), but this calls for a lot of preparatory work – and good ideas for experiments. TAP offers background information as well as suggestions for experiments, and the material can be downloaded as Word documents, so you can make your own adjustments or add notes if you like.

Via Physik-Journal, the magazine for members of the DPG (Deutsche Physikalische Gesellschaft).