This paper considers studying changes in teachers' perspectives regarding the teaching of mathematically talented students learning in heterogeneous classes. We investigate these changes through a case study of Rona, a teacher who participated in the professional development program "From One End to the Other" held in The David Yellin College of Education, Israel. The analysis focuses on 3 categories of change: awareness, practice, and self-efficacy. The results concerning Rona, 1 of the participants, demonstrate a rise in awareness of talented students, a change in the ways of meeting the needs of these students, and a rise in self-efficacy regarding the teaching of talented students. Moreover, it was found that changes in 1 category are interwoven with changes in the other categories.