Teachers kept an updated record of spontaneous use of any of
the discussed strategies by their pupils and their reaction to the
expected solution reached with the help of this heuristic strategy.
Problem solving always had constructivist form.
There was always some pupil or student who demonstrated and explained their solving procedure to other pupils.
The teachers encouraged
their pupils to search for more solving procedures.
This approach to solving was used both in case of problems from the lessons
targeted at the current subject matter and short problems used as
warm-up activities in the beginnings of some lessons.