Teachers’ Understanding of Averages

Abstract

The concept of average has been a part of the curriculum for well over 100 years. Consequently, research on students’ understanding of average has been one of widest areas explored in mathematics and statistics education research; however, research focused on teachers is still very scarce. In this chapter, research related to school students’ understanding is first described and then research dealing with teachers’ understanding or professional knowledge is analysed. Some final implications for research on the training of teachers are provided.