The paper investigates cooperative learning method and Students’ Academic achievement in Technical College Metalwork Technology in Lagos state. The study covered four out of five Technical Colleges in Lagos state. To guide the study one research question and one hypothesis are formulated and tested at 0.05 significant level. To guide the study one research question and one hypothesis are formulated and tested at 0.05 significant level and Quasi experimental designed was used for the study. Eight (80) students were randomly sampled from the four technical colleges and assigned to experimental and control groups. A thirty-five Metalwork achievement test (MWAT) adapted from National Board for Business and Technical Education past questions papers was used to assess the students. Validation of the instrument was established by four experts in metalwork technology and reliability of the instrument using person product moment correlation yields 0.89. Data collected were analysed using mean and T-test statistics. The findings revealed that cooperative learning method has significant effect on students’ academic achievement in Metal Work Technology in Technical Colleges. Based on the findings, it was recommended that cooperative learning method should be adopted in teaching metal work technology in technical colleges.