Paper Title
EFFECT OF DIMENSIONAL ANALYSIS AND ADVANCE ORGANISER ON STUDENTS’ ACHIEVEMENT IN CHEMICAL STOICHIOMETRY

Abstract
Abstract - The study examined the effect of advance organiser and dimensional analysis on the Senior Secondary School Form Two (SS2) chemistry students in stoichiometry. The pre-test-post-test experimental research design was used to investigate the effect of the treatment on the students’ achievement in stoichiometric concepts. Six public schools were randomly selected.The schools were randomly assigned to three groups of conventional lecture, advance organiser and dimensional analysis treatment groups.The responses of one hundred and seventeen students that participated in the treatment and wrote pre-test-post-test stochiometric test were analysed for the study. There were two validated instruments; the treatment packages and the stoichiometric test. The treatment packages were pilot tested in a school that was not part of the sampled schools and the stoichiometric test was pre and post administered to the students in the school. The instruments were positively correlated with 0.76 correlation coefficient values. Mean,paired t-test and analysis of variance statisticswere used to find the effective of the methods. The result showed that students inadvanceorganiser and dimensional analysis groups significantly achieved better in stoichiometry than the students in conventional lecture group. There is no significant difference between the achievement of the students in advance organiser and dimensional analysis treatment groups.The implications of the findings were discussed and recommendations were made. Keywords - Stoichiometry, Dimensional Analysis, Problem-Solving, Achievement, Advance Organiser, Conventional Lecture.