In this study, relations between learning activities of teachers and changes in their beliefs were examined. Thirty-four teachers in Dutch secondary education were asked to complete a questionnaire regarding their beliefs about teaching and learning on two occasions. They were also asked to report on learning activities that they undertook. Teachers who had changed their beliefs in a direction congruent with the aims of recent educational reforms often reported experimentation with colleagues' teaching methods. Teachers who changed their beliefs in a direction that was not congruent with the reform often reported experimentation with alternative methods due to discontent with the effectiveness of current methods. (Contains 1 figure and 7 tables.)