Reviews research into the composition and structure of cell membranes. Describes four experiments, suitable for high school students, on the role of lipids in regulating diffusion across cell boundaries. Gives purpose and procedures for each experiment, laboratory data sheets, and the results of classroom trials of the experiments. (EB)

Experimental design of packaging materials to withstand the impact of gravity by 5th grade students. (EJS)

One in a series of nine articles in a section entitled, "Electronic Computer Program and Accounting Machine Procedures.

A 1-hour laboratory exercise which demonstrates the correctness of the relativistic relationship between energy and momentum is described. In addition, a value of Planck's constant and the velocity of light can be derived. (JN)

Einstein's equivalence principle relates effects seen by an accelerating observer to those experienced by an observer in a gravitational field, providing an explanation of bending of a light beam by gravity. Because the calculations lead to results one-half the value found experimentally, obtaining the correct light deflection is discussed.…

Looks at lessons learned from the Alum Rock voucher experiment and at the current politics of educational vouchers. Condensed from a report of the same name, published by the Center for Social Organization of Schools, The Johns Hopkins University (Report No. 307, March 1981). (Editor/SJL)