This article is concerned with the approaches to the root concept that lecturers in calculus, linear algebra and complex analysis employ in their instruction. Three highly experienced university lecturers participated in the study. In the individual interviews the participants referred to roots of real numbers, roots of complex numbers, roots as…

Linking between pedagogical content knowledge and high-level subject-matter knowledge in science teacher training remains a challenge. This paper analyses the reaction of beginning student teachers to an activity designed for this purpose, "peer lecturing." This activity was a part of the requirements of an introductory zoology course,…