A KS4 lesson about using the generator effect. Information sheets included in the powerpoint. Pupils should know about the generator effect already. Worksheets mentioned are colins so not included, others available on TES would work.
A KS4 lesson about the half life of radioactive isotopes. Worksheets from “half life challenge” on TES were used. Skittles practical (google it!) also used during lesson when taught myself but not needed.