Describes an inexpensive apparatus used to study the kinetics of fast reactions. Suggests an appropriate reaction for study, and laboratory techniques. (MLH)

Describes ion-exchange methods for the qualitative determination of iron (III), chromium (III), aluminum (III), and manganese (III) and (IV) in the presence of phosphates. (MLH)

Suggests that the anatomy of a green pea be studied as the culminating laboratory activity of a botany unit in a biology course. (LS)

The properties of four different tests of the treatment effect in experiments using linguistic materials are examined. (Author/RM)

Provides a solution to the Blackwood pendulum experiment by the use of conservation of linear momentum and conservation of energy of translational motion. (CP)

A look at how the computer was used to help teachers in Israel deal with students' individual learning problems. (HB)

Describes how to assemble a respirometer from common laboratory materials for quantitative measurements of gas production. (LS)

Gives basic instructions for rearing several readily available insect species particularly well suited to use in secondary, and even elementary, school classrooms and laboratories. (LS)

Includes description of a light meter, photometer, fluid flow apparatus, and acoustic grating. (RH)

Describes a chemistry project in which lichens are identified by the analysis of the phenolic substances that they biosynthesize. (MLH)

This paper describes an experiment designed to reveal the consequences of the development of a concentration boundary layer. The rate of a mass transfer limited electrochemical reaction is measured and used to obtain the dependence of average Sherwood number on Reynolds number and entrance length. (Author/BB)

A high school biology experiment is presented. The success of this experiment may be due to the inability to prove or disprove the hypothesis upon which it is based. (BB)

Explains that understanding of science is vital to effective changes in science education. Discusses Thomas Kuhn's writings on the physical sciences and argues that Kuhn provides a better understanding of science education than do earlier models of science, although Kuhn's model fails to connect science with other social processes and interests.…