1. Chan, C. M. (2003). English language proficiency and the effects of rewording semantic structures on P5 pupils’ mathematical word problem solving. Unpublished master’s thesis, National Institute of Education, Singapore.
2. Chang, S. H. (2004). Sense-making in solving arithmetic word problems among Singapore primary school students. Unpublished master’s thesis, National Institute of Education, Singapore.
3. Charles, R., & Lester, F. K., Jr. (1984). Teaching problem solving. London: Edward Arnold.
4. Chong, T. H., Khoo, P. S., Foong, P. Y., Kaur, B., & Lim-Teo, S. K. (1991). A status-of-the-art review on mathematics education in Singapore. Singapore: Southeast Asian Review and Advisory Group (SEARRAG).
5. Chow, Y. P. (2004). Impact of open-ended problem solving as an alternative assessment on Secondary One mathematics students. Unpublished master’s thesis, National Institute of Education, Singapore.