Describes instructional techniques derived from the Piagetian tests for determining the stage of cognitive development of a child. Examines the principle of reflection and conservation of quantity. (AL)

Presents two views about lenses and optics in attempt to clarify a story written by Carolyn Hermann, "Through the Magnifying Glass." Cites two references for additional reading on students' optics difficulties. (RT)

Simple laboratory investigations are given which expose elementary students to optical crystallography techniques. Procedures and materials are designed for sixth-grade students. (SA)

Teachers may introduce students to anamorphic art (images designed to be looked at with conical mirrors or with mirrors diagonal to the image) with inexpensive cylindrical mirrors. By using polar graph paper, images can be made "correctly distorted" and will appear normal when viewed with a cylindrical mirror. (DH)

Activities used to teach optics to fifth and sixth graders are presented. Moon phases and solar and lunar eclipses are included. (SA)

Provided are hands-on activities on light, simulated emission, light radiation, and common uses of lasers. Directions and materials are discussed. Included is a diagram of a laser model. (CW)