Physics teachers are finding that the overhead projector can help them teach physics. These quiet, trouble-free projectors provide bright, clear images even in lighted rooms. It is practical to use them for projecting images from large, transparent slides, as well as for projecting images of many three-dimensioned objects of physics.Here is a visual aid that projects directly the ideas of the teacher. The teacher is an integral part of the entire process but with a larger and more colorful impact.