Acquiring Mathematics knowledge is an important factor in the achievement of the students. Learning Mathematics provides students with skill to analyze, explain, predict and find methodological solution to the problems they might face. Same students may have poor capacity to catch which may be due to several factors such as family background, economic status, education of the parents etc. Individual difference also play vital role in learning Mathematics. Achievement in Mathematics differs from type of schools, gender and locality etc. The present article aims at assessing the achievement in Mathematics among IX standard students in Trichy District. A survey method has been adopted with 90 samples from various type of schools. The investigator collected achievement score of Mathematics of IX standard students from selected schools. By applying proper statistical techniques it is proved that there is significant different in the study.