Describes a reaction rate experiment in which the manipulative skills needed are minimal and the measure of reaction rate is direct and understandable. (Author/GS)

Describes a theory concerning the formation of soap films which enables this technique to be applied to problems requiring the minimization of the surface area between fixed boundaries. (Author/CP)

Analyzes the effects of age, sex and family composition on students' preferences for the sex and birth order of their offspring. (LS)

Describes a demonstration technique for showing multiple-slit interference patterns with the use of a Fabry-Perot etalon and a laser beam. A simple derivation of the analytical expression for such fringes is presented. (Author/CP)

Describes the construction of a circuit which directly measures current in a coil of superconducting wire. (CP)

Describes an activity involving a transparent water filled box and a plane mirror in which the refraction of light rays is demonstrated. (CP)

Describes a training program for teaching assistants who presented laboratory instruction in a biology course and attended weekly seminars, in addition to being observed and video-taped while teaching. (LS)

Describes a high school botany course in which the students must collect plant specimens, prepare herbarium cards and identify the specimens. (LS)

An experimental psychology course which analyzes the broad probability of operant conditioning is described. (DE)

A course in teaching research methods in an experimental child psychology course is described. (DE)

Describes an experiment, using a soap bubble raft, intended to provide insight into the orderly packing of spherical objects and the properties of metallic crystals. Also describes a solubility product experiment which uses barium hydroxide. (MLH)