Presented is a summary of student enrollment in science, in secondary schools, during the period 1890 to 1973. The data are presented graphically and in tables with expanded graphs for the period 1958 to 1972. A discussion of the enrollment trends is included. (SL)

This article reviews and compares five recent secondary science texts: Addison-Wesley Life Science (Gr. 7-9); Prentice-Hall Life Science (Gr. 7-9); Scott Foresman Biology (Gr. 9-12); Biology: Living Systems (Gr. 10-12); and Biology: The Science of Life (Gr. 10-12). (SJL)

Described are two curriculum units from the Michigan Sea Grant Program for middle school students: The Sea Lamprey in the Great Lakes, and Great Lakes Fisheries Transition. Topics discussed include fishery rights and responsibilities, where fisheries are, the modern fishery, buying and selling fish, and preserving fish. (DS)

Six articles examine several of the critical components of program and personnel development in agricultural science including linkages between agriscience and natural resources teachers and high school science teachers, science in agriculture, biological science applications, and hydroponics. (JOW)

Presented is an activity that uses ground ivy to display different growth forms under different light intensities. Specimen preparation, materials, procedures, and probable results are discussed. Examples of graphs of the data are provided. (CW)

Described is an activity used to introduce the anatomy of the skeletal and muscular systems. A teacher conducted, video enhanced demonstration and a student activity are discussed. Included is a sample student laboratory paper. (CW)

The habitat, life history, feeding, classification, anatomy and pearl production of the American oyster (Crassostrea virginica) are presented. A list of other oyster reef inhabitants and predators is provided. Harvest and habitat loss are discussed. (CW)

The carpel is a highly modified leaf enclosing the ovules. This article describes methods for teaching about the evolution of the carpel and the nature of carpel fusion. Presents an illustration of the evolution of the most common types of compound pistil arrangement from the ancestral single-carpel marginal type of placentation. (PR)

Proposes method for determination of the pressure of a sphere by relating force and surface tension. (CP)

A battery of tests was administered to three groups of high school students who studied the Israel Biological Sciences Curriculum Study (BSCS) Adaptation Program for several years. Compared with non-BSCS students, the progress of the BSCS students in biological knowledge, inquiry skills, and understanding of science demonstrates the feasibility of…

Presents guidelines for the construction and maintenance of a life science culture center with mobile and stationary units. (CP)

Describes activity relating to the study of trees. (SL)

Discusses the use of native Australian plants in 8th and 9th grade Biology classes. (SL)

Describes activities for secondary earth science and biology classes in collecting, preparing, mounting, and manipulating microfossils. (SL)