This study was designed to determine the effect of gender-role stereotyping on Basic Science students' achievement and retention exposed to process skills acquisition strategy. The pre-test, post-test, non-equivalent control group, the quasiexperimental research design was employed for the study. The sample for the study comprised ninety-five students selected from the Katsina Central Senatorial District of Katsina State, Nigeria. Two research questions guided the study, and two null hypotheses

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... were tested at 0.05 level of significance. The instrument for data collection was the Science Process Skills Acquisition Test (SPSAT). The reliability of SPSAT was determined using Split half and the coefficient obtained was 0.76 implying that the instrument was reliable for the study. Descriptive statistic of the mean was used to answer the research questions, while ANCOVA was employed to test the hypotheses. The findings of the study indicate that there was a significant difference in the achievement and retention of male and female students in Basic Science using Process Skills Acquisition technique. The difference in achievement and retention were in favour of male students. Based on the findings, it is recommended that Basic Science teachers should be encouraged to adopt the use of the Process Skills Acquisition Strategy in teaching the subject.