This article aims to provide an insight into how students construct their professional knowledge and what the content and nature of personal professional knowledge is through the concept of PPTs (personal professional theories).

In our professorship 'Learning Strategies' of the Fontys Secondary Teacher Training College Tilburg, we stress the importance of practitioner research for the professional development of teachers. To investigate our own beliefs, we started a project in which teachers learned to do practitioner research …

Recent and ongoing curriculum innovations in Dutch secondary chemistry education have led to questions about which concepts should be central in the programme and which contexts should be used to embed these concepts into. Another important question is in the discussions about these innovations is: how …