The links below take you to a selection of our favourite Secondary NRICH tasks (content usually met between the ages of 11 and 16), chosen because they are ideal for developing subject knowledge, mathematical thinking, problem-solving skills and good mathematical habits.Ourgive an overview of the maths met between the ages of 11 and 16, with linked NRICH tasks for each curriculum topic: Enriching the Secondary Curriculum offers advice on using NRICH tasks in the classroom.You may also be interested in our book Approaches to Learning and Teaching Mathematics To find out about the thinking that informs the development of these tasks read What we think and why we think it