Main Article Content
The study investigated the cooperative group learning strategy on secondary school students’ achievement and retention in Chemistry in Anambra State. 270 SS III Chemistry students were used (124 males and 146 females). The experimental group was made up of 198 students (90 males and 108 females). The control group was made up of 72 students (34 males and 38 females). The study adopted quasi experimental research design. The experimental group was taught the concepts of Charles’s law, Boyle’s law, General Gas Equation (The Gas Laws) and thermodynamics using cooperative group learning strategy while control group was taught the same topics using conventional lecture learning strategy. The instrument for data collection was titled Achievement Retention Test (ART) with reliability of 0.84 which was validated by these experts, one senior chemistry teacher from a WAEC certified school center, a lecturer from department of science education Nnamdi Azikiwe University Awka, another lecturer from department of science education Chukwuemeka Odimegwu Ojukwu University Uli campus and one from department of educational foundation, Chukwuemeka Odumegwu Ojukwu Igbariam Campus. The test items were obtained from past WAEC question papers. The instrument consisted of 30 objective questions from the selected topics in physical chemistry. The research questions were answered using mean and standard deviation while hypotheses were tested using analysis of variance. The result of the study showed that there was significant difference in achievement between students taught chemistry with cooperative group learning strategy and those taught with conventional learning strategy in favour of experimental group. There was also significant difference in achievement and retention between male and female students taught chemistry with cooperative group learning strategy and those taught with conventional learning strategy in favour of males. There was an interaction effect of gender on students achievement and retention in chemistry using cooperative group learning strategy. Based on the findings educational implications were discussed and recommendations made.