Abstract
This study aimed at investigating the effect of think-pair-share strategy on motivation and academic performance of higher secondary school students studying chemistry course. The objectives were; to investigate the effect of think-pair-share strategy on students’ motivation in Chemistry class, to investigate the effect of think-pair-share strategy on students’ academic performance in Chemistry class, and to find the relationship between motivation and academic performance of students in Chemistry class. Quasi-experimental interrupted time series design was used. The instruments for data collection were "Chemistry Motivation Questionnaire", and Chemistry Performance Test. The data obtained were analyzed using paired sample t-test. The findings revealed a significant difference in the mean motivation and academic performance scores of the students taught using think-pair-share strategy. It was recommended that workshops and seminars should be organized by school heads to orient chemistry teachers on how to effectively use think-pair-share strategy in the teaching and learning of chemistry.