Using the US national sample from the 1995 Third International Mathematics and Science Study (TIMSS), this study examined students' competence levels in understanding the matter concept at grades 3, 4, 7, 8 and high school graduation, and compared them to the expectations in the US national science education standards. It was found that…

Discussed is the effectiveness of using analogies in chemistry instruction. Students' mathematics anxiety, spatial visualization skill, and proportional reasoning ability were found to be important aptitudes for determining chemistry achievement. The relationship between analogs and algorithms is described. (KR)

The development of students' (n=80) conceptions of matter was investigated. Students' ideas about matter were examined by asking students to verbally explain what matter means and to classify items into matter and nonmatter. A major difficulty is indicated by students regarding the concept of matter. (KR)

Examines children's understanding of burning focusing on questions such as: "What are children's views of burning prior to and after instruction?," and "Do children's views become more scientific?" A significant difference was found in children's understanding before and after instruction. (Author/MM)