Describes a method of recording the number of particles scattered at various angles for different impact parameters in an experiment illustrating the Rutherford scattering of alpha particles. (JR)

Reports the results of a study designed to identify the particular laboratory skills and techniques that should be incorporated into college courses in techniques for pre-service and in-service high school biology teachers. (JR)

Describes experiments using crude isolated chloroplast fractions which demonstrate some aspects of the photosynthetic light requiring process and a number of factors affecting them. These experiments are suitable for senior high school and college courses in biology. (JR)

Describes many ways in which string can be used in constructing simple apparatus for the science classroom and laboratory. (JR)

Describes a visit to the resource center at the John Dewey High School, Brooklyn, New York. (DS)

A simple experiment is proposed that can provide the student with some insight into the chemical properties of solids. It also demonstrates the relationship between the Gibbs free energy of formation of an ionic solid and the emf of an electrochemical cell. (DF)