Vol. 15, No. 1, June - December 2023

This study examined the effect of using 5E learning-cycle strategy in teaching ecology to senior school students offering biology. The study employed quasi-experimental design of non-randomized, non-equivalent pre-test post-test group design. The sample for the study comprised 138 senior school two (SS2) students drawn from two randomly selected co-educational schools in Ilorin-south local government area of Kwara state. The instrument was a researcher designed test entitled Test on Ecology (TOE). Data collected were analyzed using mean and ANCOVA statistical tool. The study revealed a positive effect on the performance of each group of the students when exposed to 5E learning-cycle strategy. This implies that all the experimental group students' performances improved irrespective of their score levels when compared to those students in control group. It was therefore recommended among others that teachers should employ the strategy to teach biology particular ecology

Keywords: 5E learning-cycle, instructional strategy, ecology, score levels, performance.