I made this for my AS Biology students who don’t take chemistry and needed some practice with dilutions before jumping straight into a full practical. This is a revamped version of a previous document on serial dilutions. It includes calculating volumes for simple dilutions, and a more difficult example from a 2024 paper.

Notes and questions on circular motion for IGCSE Physics

Fill-in-the-gaps notes on comparing enzyme affinity, Km and Vmax for AS Biology

Fill in gaps notes and questions to be used directly with the Biology for Cambridge International AS and A Level text.

I use this with my AS Bio students to help them understand the concept of protein synthesis. I make it a competition for the best performance and they really get involved.

Fill-in-the-gaps notes on carbohydrates for AS Biology