Science AQA whole lesson presentation (pptx+pdf) for KS3 Chemical change - acids and alkalis A Science AQA whole lesson presentation (pptx+pdf) for KS3, minimum resources needed, self-contained, bloom-graded, Ofsted-oriented, designed for 50min lessons, mixed ability. Featuring starter, titlepage, input content page, exercises with answers, objectives, hinge-point questions, extra work page, experiment fill-in sheet (most lessons include a low-effort mini-experiment), vocabulary list.