Abstract
Introducing algebra in high school is a teaching challenge, where appropriate explanations and representations are essential. This study examines teachers’ reactions to a page of explanation about the distributive law from a textbook, and investigates their pedagogical content knowledge about the teaching of algebra. Teachers were aware that students have difficulties with algebra, but the study shows that some of their strategies for teaching it are mathematically unsound. In particular, “fruit salad” approaches are still prevalent.
Helen Chick