Effect of blended learning approach on secondary school learners' mathematics achievement and retention

The study investigated how blended learning affected secondary school students' achievement and retention in mathematics. The study used a non-equivalent control group pre-test-post-test quasi-experimental design. The participants in the study were learners drawn from two secondary schools purposively chosen. Using a simple random sampling technique, the SS 1 classes from each school were then divided into experimental and control groups. Learners in the experimental group utilised the blended learning approach, whereas those in the control group utilized the conventional method. The groups received a pretest in week 1, followed by a 4-week intervention period. A posttest was administered in week 6, and a retention test (post-post-test) occurred 4 weeks after the posttest. The Mathematics Achievement Test (MAT), which has a reliability score of 0.86, was used for data collection. Data were analysed and the study questions were reported using the mean and standard deviation, and the hypotheses were tested using analysis of covariance. Results revealed that learners tutored mathematics utilising blended learning improved their mathematics achievement and retention scores more than learners tutored utilising the conventional means. Results indicated no significant gender disparity in the mean achievement scores of learners tutored mathematics utilising blended learning. Results also showed a significant gender difference in the mean retention scores of learners who learnt mathematics using blended learning, favouring female students. Based on the findings, recommendations were made.