30 minute lesson on the structure of an atom includes PPT and worksheet. Suitable for introducing atomic structure and subatomic particles at KS3 or KS4. PPT: Automatic date Starter slide (with 2 minute timer) Information slides Class activity Quick quiz Information slides Question slides (each with 1 minute timer) Plenary (with 4 minute timer) Notes contain tips for using PPT Worksheet: 2 pages (1 double sided sheet) Labelling activity Scaffolded questions Plenary