This case study investigates, at three Swedish schools, primary school students' knowledge of the equal sign. The schools were chosen as representatives of schools whose students have different socioeconomic backgrounds. The data consist of Grade 3 and 6 students' responses to an assessment form based on Matthews et al. ("JRME,"…

The purpose of this mixed-methods study was to explore how seventh graders in a suburban school in the United States and sixth graders in an urban school in Taiwan developed argumentation skills and science knowledge in a project-based learning environment that incorporated a graph-oriented, computer-assisted application (GOCAA). A total of 42…

Numerical understanding and arithmetic skills are easier to acquire for whole numbers than fractions. The "integrated theory of numerical development" posits that, in addition to these differences, whole numbers and fractions also have important commonalities. In both, students need to learn how to interpret number symbols in terms of…

Following a sociocultural perspective, this study investigates how students who have grown up using the SI (Systeme International d'Unites) (metric) or US customary (USC) systems of units for everyday use differ in their knowledge of scale and measurement. Student groups were similar in terms of socioeconomic status, curriculum, native language…

Problems of poor performance in science and mathematics education have been related to language deficiencies, including writing skills. Writing to learn science is an important skill but is not easy to acquire, especially when children learn in a second language. In order to investigate possibilities for developing writing in South African and…

This study investigated differences across four countries in the amount and nature of above-average ability and average-ability pre-adolescents' everyday life, scientific, moral, spiritual and religious questions. The participants (N = 975) of this study were fifth-and sixth-grade elementary school students from different schools in Finland (N =…