AbstractThis study examined the effect of the one-minute-paper cooperative learning strategy on junior secondary school student's academic achievement in business studies in Ogun State Nigeria. The study adopted a quasi-experimental design with a 2 x 2 x 2 factorial matrix. Three research questions and 4 hypotheses guided the study. 200 Junior Secondary School II students, who in their intact classes, were selected from four secondary schools in Ogun State, were used for the experiment. Business Studies Achievement Test (BSAT) was the instrument validated and used for data collection. The reliability coefficient of the BSAT was determined using the Cronbach alpha technique and the analysis yielded a coefficient of 0.85. Mean was used to answer the research questions while Multivariate Analysis of Covariance (MANCOVA) was employed to test the hypotheses at a 0.05 level of significance. The findings showed that there is a significant difference between the mean scores of students taught business.....