This study investigated the use of Model-Lead Test Strategy in enhancing achievement of senior secondary two students in hydrocarbon aspect of organic chemistry in Benue State of Nigeria. The study adopted the non-randomized pre-test, post-test quasi experimental control group design. The population comprises all Senior Secondary two (SSII) students studying Chemistry as a subject in all secondary schools in Makurdi Local Government Area of Benue State. The sample of the study was made up of 145 consisting of 76 males and 69 females in Senior Secondary two drawn from two schools. Stratified random sampling technique was used for selecting the Makurdi Local Government Area which was stratified into two, that is Makurdi North and South and Makurdi East and West, then, simple random sampling technique was used to select two co-educational secondary schools. Hydrocarbon Achievement Test tagged HAT was the instrument used for data collection. The instrument was validated by three experts. The reliability coefficient of HAT was 0.99 using Kuder Richardson 20. Using Analysis of Covariance it was found that there was a significant difference between pretest and post-test achievement mean scores of the experimental and control groups of SS II students in Chemistry. It was also found that there was a significant effect of Model –Lead-Test strategy (experimental treatment) on male students’ achievement in hydrocarbon aspect of organic chemistry and that there was a significant effect of Model-Lead-Test strategy (experimental treatment) on female students’ achievement in organic chemistry. Based on the findings it is recommended among others that chemistry teachers should use Model-Lead-Test strategy to teach organic chemistry irrespective of gender and school type.
Keywords: teaching organic chemistry; hydrocarbon; model-lead-test strategy; achievement in chemistry; gender.
