Evaluated an experimental program in which students were taught to design models as a tool in the learning of percentages and compared results with outcomes from a control group in which teachers directly provided models. Results for 121 fifth graders in The Netherlands show significantly better performance in experimental condition than in the…

Twenty primary school students were randomly assigned by a matching procedure to either an experimental or control group. During the whole school year, both groups were taught mathematics according to the curriculum in the school; however, the groups followed different programs in fractions. Students in the experimental curriculum were provided…

Focused on two fifth graders in the Netherlands and studied two approaches to working with models in primary mathematics education: providing models versus designing models in coconstruction. Findings suggest that understanding may be improved by models students made themselves, and that students of this age are able to design models working…

Studied the teaching and learning of fractions in two matched groups of 10 9-10-year-olds in the Netherlands. In the experimental group, fractions were introduced using the bar and number line as mental models, while the control group used fair sharing and the circle model. The experimental group showed more proficiency in fractions after 1 year.…

The study examined methods of mathematical problem solving with 34 gifted and 34 average Dutch 10 year olds. Typical questioning protocols are diagrammed and results tabulated. Preliminary findings suggest the potential value of explicit teaching of advanced mathematical problem-solving skills to pupils of average ability. (DB)

Maintains that current research suggests that heterogeneous grouping is preferable. Reports on a study of a new mathematics curriculum using 600 students in 6 Dutch schools. Finds that students in heterogeneous classes taught with cooperative-learning techniques achieved more than students in traditional ability-grouped classrooms. (CFR)

Results showed hardly any differences in time-on-task behavior between third and fourth grade pupils in mixed age single age mathematics and language arts classes in the Netherlands. Students in mixed age classes spent more time working individually. The ability level of the students had little impact on time-on-task behavior. (Author/RM)