The thought processes of 507 elementary, secondary, and university students engaged in problem-solving situations are examined in this study. Results indicated that pupils who got correct answers often showed incorrect reasoning justifications. No significant sex differences were indicated. (MP)

A study of 255 fifth graders and 177 eighth graders from 12 randomly chosen Mexican schools was conducted to identify and characterize the students' computational estimation skills and strategies. Data from computational estimation tests and selected interviews revealed that Mexican students employed general estimation processes similar to U.S.…

Results of a comparison of Papua New Guinea bilingual and monolingual students' (n=232) mathematics achievement indicated that bilingual students competent in both languages scored significantly higher on two different types of mathematical tests than both low-competent bilingual students and monolingual students. (32 references)