This guide describes activities and materials which can be used in a mathematics laboratory approach to a basic mathematics program for grades 1-6. One-hundred thirteen activities pertaining to measurement concepts are described in terms of purpose, suggested grade levels, materials needed, and procedures. Some specific concepts include: linear measurement (33 activities), area and volume (31 activities), weight measurement (31 activities), time measurement (18 activities), estimation, inequalities, equalities, graphing, comparisons, circumference, scale drawing, applications, similarity, non standard units, measure, counting, surface area, weight, density, indirect area measure, cost calculations, conservation, recording data, problem solving, time continuum, directionality, shadows and time relationships. Most activities utilize the English system of measurement, but many can be adapted to the metric system. The guide concludes with a list of selected manipulative materials for mathematics laboratory use. (JBW)