Twenty five slides (two complete lessons) of fun and engaging activities with integrated answers compiled for the NEW GCSE Biology specification. Aligned to the AQA exam board. Prepared with differentiated activities to achieve the following learning objectives: Bacteria multiply by simple cell division - starter video of bacterial division and discussion; video on different microorganisms - identify as many as you can! How to grow (at lower temperatures) and use uncontaminated cultures of bacteria - sterile technique (aseptic technique) information slides; extended writing task to describe the process using the diagrams and video information - scaffolding with identified key words/terms to include; storage of plates information and brief writing task; linking activity on culture mediums; ordering task of the steps involved in growing microorganisms in the lab. Calculate the number of bacteria in a population - enumeration of bacteria information slide and worked example to try followed by differentiated questions to calculate bacterial populations with fully integrated answers. The effect of disinfectants and antibiotics on bacterial growth - the great microbiology quiz activity; plenary linking terms to their roles in preventing bacterial growth.