How the manipulative aid called the "10 frame" can be used to teach the number combinations for 10, the addition facts that bridge 10, and the place value nature of our number system is described. (MNS)

Plans are given for the construction of a "counting frame." This device consists of beads strung on a wire and used as a counting aid. (JP)

Discusses play and play centers for children. (Editor)

Activities are described that involve polyhedrons constructed with a marble inside enabling them to roll across a smooth surface. Directions are given for constructing such a tetrahedron. (DT)

Lists of materials for a mathematics laboratory and some suggestions for activities are given. (DT)

Patterns for a set of Napiers Bones and for a denominate number slide rule are provided, with instructions on how to use each of the calculating instruments. (DT)

This article shows how simple instruments may be used to construct angles of certain measures and applies this procedure to more detailed problems. A proof of the Pythagorean Theorem is given using these procedures. (CT)