This manual provides a set of tasks for use in the microteaching context of a Teaching Laboratory to be used in teaching pupils an approach to problem solving. The introduction describes the contents and functioning of the Teaching Laboratory and the way in which the manual should be used. Details of five lessons are then given. The first lesson is unstructured, the only requirement being that it should be relevant to the curriculum. It is followed by a description of the evaluation methods, the different aspects of the learning situation, and those of teaching problem solving. Lesson 2 presents the problem; lesson 3 formulates hypotheses; lesson 4 verifies hypotheses; and lesson 5 applies the generalization. In the description of each lesson the instructional objectives and methods are detailed, and an evaluation guide and listening guide are also included for each. (MBM)