GCSE AQA Biology Required practical revision comprises of a small number of revision questions based around each of the required practicals. Suitable for synergy, trilogy or biology teachers/students.Each of the 10 activity slides can take between 5 and 30 minutes for students to complete depending on their ability and offer suggestions on what to focus on in each experiment to ensure students develop scientific competancy . Activites can be used as a starter activity, as a review a the end of a practical activity, a retrieval activity or general revision.