Relates information on the characteristics, habitats, and behaviors of praying mantises. Describes the distinctive anatomical features of mantids. Provides suggestions for the care and maintenance of captive mantids. (ML)

Provides background information on the earthworm. Reviews basic anatomical, behavioral, and reproductive facts. Offers suggestions for procuring, maintaining, and breeding colonies for classroom use. (ML)

Describes a method, using simple algebraic notation, for calculating the nature of the salient features of a sugar pyranoid ring, the steric disposition of substituents about the reference, and the anomeric carbon atoms contained within the ring. (CS)

Describes an approach to titration curves which eliminates the choice of approximations and the algebraic complexity of accurately solving for hydrogen ion concentration. This technique regards moles of titrant as the dependent variable. (CS)

Terms commonly used in computer science are presented in three descriptive paragraphs as a basic vocabulary. Announces the publication of a glossary which addresses the subject of computer terminology in detail. (CS)

Presents a scheme that illustrates the interdependence of proteins and nucleic acids in hereditary functions, built around the arguments and assertions on the nature and synthesis of nucleic acids and proteins presented in current texts. Provides background information in DNA synthesis, RNA synthesis, and a combined "hereditary system." (CS)

Provides an explanation for the apparent emission of x-rays from video display terminals. (CS)

Lists alphabetically by author the articles, notes and letters published in Volume 18 of the "Physics Teacher." (CS)

Describes a system of heuristics for problem solving and instructional methods for presenting it to secondary school students. (CS)

Reviews properties, geologic occurrences, availability to plants, and cycles of the element selenium. (CS)

Describes how Gibbs valley graphs can clarify the relation between the Gibbs function and chemical equilibrium. Gives examples from gas phase equilibria. (CS)

Describes an activity-based science program. Provides information on background thinking, selecting an activity, planning for instruction, and following up. Discusses choosing activities that meet the needs of students while still fulfilling curriculum requirements and reaching personal academic goals. (SAH)

Science interfacing packages (also known as microcomputer-based laboratories or probeware) generally consist of a set of programs on disks, a user's manual, and hardware which includes one or more sensory devices. Together with a microcomputer they combine to make a powerful data acquisition and analysis tool. Packages are available for accurately…

Provides information on state trees for each of the 50 states and the District of Columbia. Includes for each state: (1) year in which state tree was chosen; (2) common and scientific names of the tree; (3) arbor day observance; (4) address of state forester; and (5) drawings of the tree, leaf, and fruit or cone. (JN)

This yearbook, prepared by a committee appointed to look at the teaching of science, makes recommendations concerning the development of science programs at all levels of education, including the teaching of science in college and science teacher education. Chapters 1 through 5 address the following topics: interpretations of what seems to be…