Short articles describe the demonstration of Brownian motion in a bubble included in a quartz crystal, an inexpensive technique for investigating conservation of momentum, a method of teaching vector addition, and ideas for inexpensive substitutes for heavy masses and for additional laboratory bench space. (AL)

Describes the development, evaluation, and use of Laboratory Explorations in Biology" as an integral part of the Mid-continent Regional Educational Laboratory (McREL) Inquiry Role Approach". Student and teacher reactions are described, and an example of student evaluation of peers' achievement is given. (AL)

Discusses the influence of BSCS on Modern biology teaching. Indicates that not only have BSCS materials been widely adopted, they have stimulated the modernization and up-dating of course materials produced by commercial sources and influenced the form and content of standardized biology tests in that the tests now consist largely of open-ended,…

Protozoa inhabiting the rumen of large grazing animals can be used to illustrate symbiotic animal associations. Gives a key to the ciliates most commonly found, several drawings, and a chart relating rumen fauna to the phylogenetic tree of the hosts. (EB)