Bachelor Thesis from the year 2018 in the subject Mathematics - Didactics, grade: 6, Mountains of the Moon University, language: English, abstract: This study aimed at establishing teachers' quality factors that affect pupils' achievement in mathematics. The study was based on two objectives; to establish the relative effect of teacher's qualification and experience on pupils' achievement levels, to establish the relationship between teachers' commitment and pupils' achievement in mathematics. The study tested the hypotheses; there is no correlation between teacher's qualification and pupils' achievement levels, there is no relationship between teachers experience and pupils' achievement levels, there is no correlation between teachers' commitment and pupils' achievement in mathematics. The study used teachers, pupils and head teachers to obtain data, a total of 70 respondents were randomly and purposively selected from five primary schools of Kyondo sub-county, Kasese district. Basing on the findings and discussions, it was revealed that first, the teachers' qualification and experience have nothing to do with pupils' level of achievement in mathematics. Secondly, the teachers' low level of commitment is responsible for the low levels of pupils' achievement in Kyondo sub-county.