77 files across 11 fully resourced lessons covering the complete Edexcel IGCSE Chemistry acids, bases, and salts topic (spec points 2.28–2.43C plus 1.29, 1.31, 1.34C). Every lesson includes a PowerPoint with detailed speaker notes, a tiered worksheet (Must/Should/Could), homework, a scaffolded support task, key terminology sheet, knowledge organiser, and full mark scheme. Four lessons include practical guidance covering all three required practicals. Single Award and Double Award content included, with Chemistry-only material clearly labelled. Designed for mixed-ability classrooms — differentiation is built into the structure, not bolted on. A cover teacher could deliver any lesson from the speaker notes alone.