Research on mathematics education, grades K-8, for 1969

This is the thirteenth in the series of annual listings of research concerned with elementary school mathematics.1 The annotated format used for the last two listings has been retained. The annotations do not summarize the study in most cases; rather, an attempt was made to state the findings that may be of particular importance to the teacher. They may serve to guide readers to those studies that are most pertinent for their needs. Little evaluation is possible when space is limited; however, each of the findings has some support within the limitations of the study on which it is based.