This study investigated the effects of problem-solving and co-operative teaching methods on academic performance of secondary school students in accounting in Kaduna State, Nigeria. The research design was a quasi-experimental design. The population was 1509. The sample was 90 students, which were obtained using purposive sampling method. The instruments used for data collection were Instructional Package for Financial Accounting (IPFA) and Financial Accounting Achievement Test (FAAT). The data collected were analyzed using t-test at P ≤ 0.05.The findings of the study among others revealed that Problem-solving teaching method has significant effects on students' academic performance in financial accounting in senior secondary schools in Kaduna State, cooperative teaching method had more effects on students' performance in financial accounting in senior secondary schools in Kaduna States. The researcher concluded that problem-solving and co-operative teaching methods are better and more effective in teaching and learning financial accounting and effective use of these methods could enhance secondary school students' performance in financial accounting. The researcher therefore recommended that secondary school teachers should be encouraged to use problem-solving and cooperative teaching methods in teach financial accounting in senior secondary schools.