In this article, research on nonhuman animals is reviewed to show that there is no discontinuity between humans and other animals. For both, high density is not necessarily harmful. Rather, the effect of high density depends on other factors in the situation. (Author)

The study investigated specific student behavior in introductory and advanced college laboratories in botany, chemistry, geology, physics, and zoology. Behaviors were observed, described, and classified with no effort made to induce change, detail underlying conditions, or identify correlates. (Author/RE)

Describes the status of teaching physics at Xaverian High School, Brooklyn, New York. The enrollment of students in physics, instructional materials, laboratory activities, and coordination between physics and mathematics are described. (HM)

Describes a method utilized at Iowa State University for teaching a biochemistry laboratory course for non-majors involving the use of student independent projects and experimental choices. (BT)

Opportunities for high school students and adults to take courses in aviation education as part of the science curriculum in Wichita, Kansas, are described. (Author/SA)

Describes a resonance apparatus for the measurement of Cp/Cv for different gases. In the apparatus a magnetically supported piston in a vertical cylindrical glass tube containing the gas is forced into oscillation by means of a standard audio signal generator. (Author/GA)

Investigated is the period of a simple pendulum. The cases of the rigid rod and fexible cord are reviewed. By applying a variational principle it is proven that the first order correction to the period is the same for both the cord and the rod. (GA)

Describes a simple apparatus for producing strip holograms with a number of slit-shaped exposures displaced along the vertical direction. The hologram maintains full horizontal parallax, but the slit aperture reduces the vertical viewing angle of the animated object. (Author/GA)

Describes a system of small electronic modules suitable to teach digital electronics, construct digital systems for the instrumentation of standard experiments, or, teach analog electronics. Explains both the design of the modules, and some of the instructional uses of the system. (GA)

Describes simple modifications that will permit external triggering of certain electronic timers, thus allowing their use in experiments which require greater precision than was possible with inexpensive apparatus. (GA)

A three-day school-based in-service course for heads of secondary German department is described. Participants' reactions are noted. (SJL)

Describes a simple experiment for measuring the speed of sound using a partially filled beer bottle as a resonator. Outlines and discusses the approximations made in arriving at the procedure. (GA)

Investigated were the science attitudes of preservice elementary teachers when "professionally related activities" were incorporated into a science laboratory course for elementary education majors. (Author/SA)

Discussions from the conference on "The Use of Animals in High School Biology Classes" are highlighted in this article. The list of science fair rules, which resulted from the conference, is included. (SA)

A demonstration is described that encourages students to engage in inquiry in biology. Using chemicals and an overhead projector, the instructor can simulate a living organism projected onto a screen. The reaction can aid students in defining the characteristics of life. (SA)