GCSE Physics units and conversions
This powerpoint focuses on AQA physics equations (but would be appropriate for any exam board).
It goes through all the units needed, and how to convert between units using prefixes and orders of ten.
There are tasks built in for the students to complete.
This could either be used as a full lesson or to dip into depending on the ability of the class. I have broken the topic down into beginner, intermediate and expert.