A lesson for KS3 students or low level GCSE, introduces the concept of atoms, charge, how charges can be transferred, and some of the risks associated with charged materials.
Lesson comes fully planned (just follow the ppt), and includes an activity with a plasma ball (if you've got one; if not, just leave it out!). There's a link to a youtube video called electric graffiti in the ppt as well (it's 14 min long but worth it, the students always like watching it).
NB: I deliberately avoided using the Van der Graaf generator, as I wanted to save it for GCSE.
To recall structure of atom
To describe how charges can be transferred
To describe and explain the risks and precaution of using charge