The contribution introduces the results of research studies, in which on the basis of interviews with teachers polostrukturovaného physics checked as preferred targets in the context of experimentation in teaching physics at an elementary school. Results suggest that teachers combine experimentation with a qualitative demonstration of the physical phenomenon, whether it is a demonstration experiment. In the case of pupil is the objective of the experiment focused on practical skills associated with students, quantitatively and qualitatively, the verification of theoretical statements.