Studies that investigated students' attitudes toward mathematics and its relationships with achievement are scarce in Singapore. To address this issue, the mathematics attitudes and achievement of 984 junior college students were measured. Results indicated that students had positive attitudes toward mathematics but lacked intrinsic motivation to do mathematics. Students were extrinsically motivated to study mathematics, but the relationship between extrinsic motivation and achievement was weak. However, there was a significant positive correlation between intrinsic motivation and achievement. This is contrary to the beliefs of many educators and parents in Singapore who believe in extrinsic rewards and punishments to encourage better achievement. This study suggests that Singapore educators and parents should focus more on how to motivate students intrinsically. (Contains 1 figure and 1 table.) [For the complete proceedings, "Shaping the Future of Mathematics Education. Proceedings of the Annual Conference of the Mathematics Education Research Group of Australasia (33rd, Freemantle, Western Australia, Australia, July 3-7, 2010)," see ED520764.]