Abstrakt
The paper describes results of a 4-month experiment whose main aim was to change pupils' culture of problem solving. The experiment involved 11 classes from lower secondary basic schools and upper secondary grammar schools in North Bohemian region: the classes were taught by different mathematics teachers.
In these four months the teachers tried to teach the following heuristic strategies in problem solving: Guess - check - revise, Systematic experimentation, Working backwards, Introduction of an auxiliary element, and Omitting a condition. The experiment proved that if pupils are introduced to an environment that supports their creativity, their attitude towards problém solving changes in a positive way already after the period of four months.