Discusses the vicious circle of perpetuating traditional practices in the use of laboratory organisms. Makes a plea for biology teachers to use new organisms for new tasks, indigenous organisms rather than imported ones, living organisms rather than dead, and organisms to explicate principles rather than as sources of stultifying detail. (JR)

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)