Points out findings that students are motivated quite highly if a systems approach is used for instruction. Data presented reveal overall increased participation by students in instructional program. (PS)

Short articles on the alkylation of aniline, the preparation and properties of perbromate, using scrap copper in chemistry instruction, a safe method of burning hydrogen, and the use of an ion-charge model as an alternative to the mole concept in secondary school instruction. (AL)

Short articles describe techniques for stroboscopic photography of moving objects, mechanical and electronic demonstrations of beats at radio frequencies, simple apparatus for the determination of the specific heat of steam, and the measurement of electrostatic potential by a flame probe. (AL)

Applies set theory to the mono- and dihybrid Mendelian genetic crosses, multiple allelism, sex linkage, and linkage to show the application of mathematics to biology teaching (and of biology examples to mathematics instruction). (AL)

Summarizes the work of the committee, lists its membership, and provides the addresses of (English) suppliers of microbiological equipment and (British) sources of microbial cultures, including bacteria, fungi, and freshwater plankton. (AL)

Briefly reviews the content of some of the talks at the March 1972 meeting of the Scottish Branch of The Institute of Physics. (PR)

Argues that killing animals in biology classes detracts from the true aim of biology teaching--the development of reverence for life. (AL)

Reports comparison of three models of apparatus designed to collect gas evolved by a photosynthesizing water plant. Problems of design and operation are reported for each model. (AL)

Students can be taught to appreciate the wealth of information that can be efficiently presented in a mathematical formula, and get a glimpse at a simplifying approximation plus a mathematical use of symmetry. (DF)

Describes current difficulties in teaching physics in Indian secondary schools, including the existence in all states of India of different syllabi of varying standards and content without the syllabi being related to the conditions and hardware available. (PR)