The study used a correlational ex-post facto research design conducted on forms I, II, III and IV students from 32 secondary schools stratified by gender, school category and location in Kenya’s Nairobi province and three districts of Rift Valley province, which included Nakuru, Kericho and Koibatek. Students’ names were obtained from class registers and used to randomly select a sample of 649 students (320 boys and 329 girls) using a table of random numbers. The data-collection questionnaire used comprised the students’ MSC scale and students’ motivation-to-learn-mathematics (SMOT) scale that covered the four dimensions of motivation to learn mathematics (Appendix A). The two scales which had 12 and 28 items, respectively, were embedded in a 108-item students’ questionnaire of a major study conducted by one of the researchers (Githua, 2001) on ‘factors related to the motivation to learn mathematics among secondary school students in Kenya’s Nairobi and Rift Valley provinces. Questionnaire items were reviewed and found to be content valid by a panel of educational researchers in Kenya. A pilot test in Nyandarua and Nyeri Districts that have similar students, schools and learning conditions with those in the study area indicated Cronbach alpha reliability coefficients of 0.88 and 0.89 for MSC and SMOT, respectively. The researchers visited the 32-selected schools and arranged with head teachers and heads of mathematics departments for heads of mathematics departments to group administer the questionnaires to students. The response rate achieved after a series of follow-ups was 98.3%, which the researchers considered satisfactory for the study. Descriptive statistics, correlation and simple regression were used in data analysis and in testing the hypotheses.