The role of spectral color slides in laboratory situations is discussed, then experiments for secondary school students concerning color and wave length, evidence of quantization, and the ionization energy of the hydrogen atom are outlined. Teaching guidelines for creating a set of spectrograms and photographic specifications are provided. (DT)

A laboratory instructional program involving metal-insulator-semiconductor (MIS) devices is described. In the first of a two-part experiment, students become familiar with the important parameters of a simple MIS device and learn measurement techniques; in the second part, device fabrication procedures are learned. (DT)

Describes a science activity, using a bacterium and a fungus, to illustrate the effects of competition and barriers on geographical distribution. (Author/PEB)

Describes an experimental "accident" that resulted in much student learning, seeks help in the identification of nematodes, and suggests biology teachers introduce similar accidents into their teaching to stimulate student interest. (PEB)

Described are projects and observations that can be conducted with the laboratory mouse to study mammalian growth and development. (RH)

An electronic device is described which can be used for demonstrations and laboratory work in Fourier synthesis, phase and group speeds, beats and modulation, and Lissajous figures. The hardware required is inexpensive and simple. (Author/RH)

The characteristics and the role of a statistics laboratory in teaching statistics is discussed. Particular attention is given to the training of students in various academic areas who will need to use statistics in their work. (JP)