This study ex-ray the effect of blended learning approach on students’ academic achievement and retention: a case study of Air Force Secondary School Rivers state, Nigeria. Two research questions and two research hypothesis guided the study. The study adopted a quasi-experimental research design. The population of the study was one thousand two hundred (1200) students, while the sample was eighty (80) students purposefully selected from the entire population. Social studies achievement test (SAT) was used as instrument for data collection, mean, standard deviation and analysis of variance (ANOVA) were the statistical tools used for the study. The finding revealed that students taught using station-rotation model performed most followed by students taught using conventional method, also that students taught using the station- rotation model had the highest retention level, than those taught using the conventional method. Conclusion and some recommendations were also made.