A collection of articles from the ARITHMETIC TEACHER is presented which are about practical, classroom-tested ideas for the instruction and use of teacher-made instructional aids. These entries deal only with manipulative type aids. They have been selected for the clarity of purpose and relationship to contemporary topics in the elementary school mathematics curriculum. The articles provide sufficient information and specifications so that teachers can construct the aid and include directions or examples relative to using the aid for instruction. The organization of topics is based on major strands of elementary school mathematics: whole numbers, numeration, integers, rational numbers, geometry, and measurement. (JP)