Free Week 10 GCSE/iGCSE Biology lesson: human digestion and enzymes, a food-testing practical, and the fistula patient who let one doctor watch digestion happen live.
This week puts ratio to work in real-world contexts: scaling recipes with direct proportion, working out which supermarket deal is actually better value, reading scale drawings and maps, and converting between units of measurement — some of the most genuinely useful skills in the whole course.
