ABSTRACT rhe purpose of this study was the effect of mathematics teacher quality on :he academic achievement of students in the selected schools of Ugenya District, Nyanza province of Kenya. rhe objectives of the study were; to determine if teacher's motivation affects 3Cademic performance of students in Ugenya district, to determine whether f teacher qualification affects academic achievement of students in Ugenya District, and to investigate whether if a facility at school affects academic :lerformance of students in Ugenya district. fhe methods used for data collection were questionnaires to the teachers 3nd interview guide to the headmasters of the schools which participated in :he study. rindings indicated that teacher experience, qualification of the teacher and the motivation of the teacher have a direct relationship with the performance :>f students in mathematics. Recommendations included Government making facilities at school for mathematics teachers to teach in a conducive environment in order to aid the better performance of mathematics students in their schools and that ;:~overnment should make sure that it facilitates unqualified teachers to go For further studies to improve the academic achievement of students in mathematics.