An international team of mathematics and science educators developed a method of investigating the pedagogical content parts of preservice teachers' knowledge bases. They asked preservice teachers to prepare a lesson plan about a topic (area) as if they had to teach it, then they later interviewed them. The method produced significant, rich…

Examined preservice teachers' concerns about transforming their academic knowledge into teaching activities (pedagogical content concerns). Prospective chemistry teachers individually prepared high school chemistry lessons. During group meetings, they presented and discussed the lesson plans. Data from interviews during individual and group…