Olutola, AdekunleOgunjimi, MayowaDaramola, Dorcas2023-03-132023-03-1320212523-109Xhttps://uilspace.unilorin.edu.ng/handle/20.500.12484/8785The focus of the study is to assess the impact of school type, gender and age on attitude and mathematics achievement of senior secondary school (SSS) students in Lagos State, Nigeria. A survey research design was used in the study. Twenty-four randomly selected SSS comprised of twelve public and twelve private schools were used in the study. Randomly selected seven hundred and twenty (720) SSS two students were involved in the study. ‘Mathematics Achievement Test’ (MAT) and ‘Students Attitude Scale’ (SAS) with Kuder Richardson (KR-20) and test-test reliability coefficient of 0.85 and 0.87 respectively were used to obtain data for the study. T-test and Analysis of Variance (ANOVA) statistics were used to analyse the data collected. Findings revealed that the significant difference exist between public and private SSS students’ achievement and attitude in Mathematics. Besides, the significant difference existed in the SSS students’ attitude towards mathematics based on gender and achievement in Mathematics based on age. It was recommended that government should provide adequate instructional materials that can enhance the achievement of students in mathematics.The focus of the study is to assess the impact of school type, gender and age on attitude and mathematics achievement of senior secondary school (SSS) students in Lagos State, Nigeria. A survey research design was used in the study. Twenty-four randomly selected SSS comprised of twelve public and twelve private schools were used in the study. Randomly selected seven hundred and twenty (720) SSS two students were involved in the study. ‘Mathematics Achievement Test’ (MAT) and ‘Students Attitude Scale’ (SAS) with Kuder Richardson (KR-20) and test-test reliability coefficient of 0.85 and 0.87 respectively were used to obtain data for the study. T-test and Analysis of Variance (ANOVA) statistics were used to analyse the data collected. Findings revealed that the significant difference exist between public and private SSS students’ achievement and attitude in Mathematics. Besides, the significant difference existed in the SSS students’ attitude towards mathematics based on gender and achievement in Mathematics based on age. It was recommended that government should provide adequate instructional materials that can enhance the achievement of students in mathematics.enStudents, Mathematics Achievement, Attitude, Public Schools, Private SchoolsStudents, Mathematics Achievement, Attitude, Public Schools, Private SchoolsArticle