This guide describes activities and materials which can be used in a mathematics laboratory approach for a basic mathematics program for grades 1-6. Twenty-nine activities relate to operations with whole numbers and twenty-five activities pertain to operations with fractions. These activities are described in terms of purpose, suggested grade levels, materials needed, and procedures. Some specific concepts presented are: place value, order of operations, equalities and inequalities, whole number operations, patterns, time measure, number facts, number sentences, ratio, applications, fractional parts and operations, geometric shapes, area, division problem solving, weighing, scale, linear measure, and equivalent fractions. The guide contains a categorical listing of materials such as improvised materials and games, commercial materials and games, general supplies, and other manipulative materials. (JBW)