Eric.ed.gov – Math, Summer of ’72. Summer Staff Development, Area 1.
eric.ed.gov har udgivet: This paper presents descriptions of a variety of learning activities suitable for the elementary grades. The activities were developed by teachers, and contributed by them to this volume. Some of the activities are short while others are intended to be carried out over several days. Paper-and-pencil activities, games, and projects involving making things are included. (SD) Link til kilde