Home-schooling or just general revision resources:
Mark Levesley worksheets
COVID-19 Themed Worksheets20 well thought-out biological topics from Mark Levesley (UK-based science education writer, with an interest in Key Stage 3 and GCSE science education)
Foaming Towers pH A more controlled version of the infamous elephant's toothpaste demo, showing effect of varying pH on the rate of activity of catalase from yeast.
I was sent this list of a few resources with 'fun and educational science activities'.
They are obviously American and I'm not sure exactly what age they are aimed at, but they look interesting . . .