Area of a Triangle Lesson

A series of lessons (2-3) on finding the area of a triangle. The lesson allows pupils to practice the basic skill but al calculate reverse problems and compound shape questions. There are also some reasoning tasks suitable for the new curriculum and algebraic problems to challenge the more able learners.
All tasks are differentiated to at least 3 levels. There are reasoning and problem solving tasks which are suitable for the new curriculum. All tasks have solutions so that it is easy for the pupils to mark their work. This has been used and allowed pupils to master the skill and for the more able to develop their understanding