Abstract:

Mathematics is very important in the society because it is the foundation of science, technology and engineering. Unfortunately low achievement in mathematics affects a large number of students due to various deficits that include attitudes, motivation, anxiety and instructional factors such as teaching methods. Creative and innovative forms of instruction that are more effective and student-centred need to be employed to improve the achievement in mathematics. The purpose of the study was to explore the efficacy of Harkness teaching method on students’ achievement in mathematics. Quasi-experimental research design and specifically Solomon Four Group was used in the study. The target population comprised of secondary school students in Meru South Sub-county. The accessible population was Form three students in co-educational schools in the Sub-county. The sample size was 79 form three students from four secondary schools in the Sub-county. Simple random sampling was used t...