Experiments perform a number of functions in physics teaching - from a fun add-on of a very formal learning style to the cornerstone of a teaching method. A method of acquiring physical knowledge by using experiments, problem solving, tasks, etc. is a basic approach of teaching physics according to the Heureka (in English "Eureka") project.
Students are guided to analyse and solve scientific issues whereby they discover inquire new physical principles. The experiments are the main part of the work with the teachers, both in the long-term activities organized for the new participants of the Heureka project, and also in the workshops of the regional centres for physics teachers organized by Elixir to Schools.
In this paper we will inform about our experience of working with teachers. The teachers' feedback to the project will be presented as a part of the study.