This study examined the effect of cooperative learning approach on financial accounting achievement among secondary school students in Gombe state, Nigeria. A pre-test-post-test-control group design was adopted. 120 students participated in the study were selected randomly from six schools. The students were divided into two equal groups, namely: experimental (i.e., cooperative learning approach) and control group (i.e., conventional approach), both at random. A Financial Accounting Achievement Test (FAAT) was used as an instrument for data collection. The study found that at the pre-test stage, there was no statistically significant difference between the achievement of cooperative learning students and conventional approach students, the results suggested that the students were initially equal in terms of their achievements. Nevertheless, at the post-test stage, the achievement of students who were exposed to the cooperative learning was found to be significantly better than the achievement of students who were exposed to the conventional approach. The findings further suggested that cooperative learning approach effectively enhanced the financial accounting achievement of the secondary school students. It is, therefore, recommended that government should encourage both curriculum planners and secondary schools' teachers to adopt cooperative learning approach as an instructional approach for teaching financial accounting in secondary schools to improve students' achievement in the subject.