Presented is a resource book to be used with instructional kits for elementary school science students, grade 3. The individual units at this grade level are based on curriculum which has been developed by the National Science Foundation in the 1960s and revised to meet student and teacher identified needs in Anchorage, Alaska. Six units are included within this guide. Each unit lists kit and non-kit items, supplemental materials, teacher background information, and proposed schedule. Worksheet masters are also included. Unit topics include Electricity, Force-Motion and Machines, Weather, Sink or Float, Mystery Powders, and Plants and Animals. (CS)