ABSTRACT
This research work was carried out to investigate the difficult concepts in chemistry and their effects on the achievement of students’ in some secondary schools in Sokoto metropolis. Criteria used in selecting schools were stratified random selection in which Five (5) schools were selected within Sokoto metropolis comprising of two (2) all female school, two (2) all male school and a mixed school so as to determine whether there is significance gender difference in students’ perception of difficult concepts in chemistry. Analysis of the data collected reveals that; concepts students perceived as difficult in chemistry and gender differences has little or no effect in the academic achievements of students’.
