Some helpful ideas are proposed for use by biology teachers. Topics included are Food Webs,'' Key to Identification of Families,'' Viruses,'' Sieve Tube,'' Woodlice,'' Ecology of Oak Leaf Roller Moth,'' and Model Making.'' (PS)

Discusses two sampling methods used to evaluate ambient air: the bubbler technique and the use of static samplers. Indicates that vegetation is also excellent indicator of air pollution effects. (CC)

Discusses implementation and advantages of take-home experiments, including three respective examples in acoustics, magnetism, and optics. The activities can be categorized into demonstration experiments, see-what-you-can-find-out'' experiments, and experiments requiring preparatory class discussion or written directions. (CC)

Provides description of an activity in which students synthesized sulfanilamide or sulfathiazole, II. The drug was then used as a chemotherapeutic agent. (RH)

Describes author's use of a three foot long tube, open at both ends, to exemplify that his highest falsetto note is lower than his lowest whistled note. (CC)

Describes experiments on flash photolysis and relaxation kinetics for college students using any standard photographic flash. List of experiments with explanations are included. (PS)

Experiments give students a practical awareness of pollution in its different forms. (RK)