The study used a correlation design to explore relationships among locus of control, self concept & academic achievement. The study population comprised all the form four students from the 52 public secondary schools in Bureti District. Stratified random sampling was used to select 5 secondary schools with simple random sampling being used to select 200 students. Data was collected using a questionnaire to generate both qualitative and quantitative data. The study findings revealed that students had a positive self concept & internal locus of control. It further established that majority of the students believe in themselves, have control of their lives, evaluated themselves positively and also accepted their identity. Pearson correlation coefficient analysis revealed that there was a significant but weak correlation between students'; academic performance and locus of control; students' academic performance versus self concept & also a significant difference between female and male students' locus of control. However, the results showed that there was no significant gender difference in students self concept.