Gives details of three experiments with alcoholic fermentation by yeasts which yield carbon dioxide and ethanol. Lists procedures for making cider, vinegar, and fermentation gases. Provides some historical background and detailed equipment requirements. (DDR)

Describes variations on atmospheric pressure demonstrations and some systematic studies. Demonstrations use steam, generated either externally or internally to the container, to sweep out residual air. Preferred vessels collapsed slowly. Demonstrations use plastic milk jugs set in layers of aluminum foil, pop bottles immersed in 4-L beakers…

Analyzes student performance on solution calorimetry problems in an introductory university chemistry class. Includes data from written classroom exams for 207 students and an extensive longitudinal interview with a student. Indicates learning difficulties, most of which appear to originate from failure to understand, that net increases and…

Discusses the role of language laboratories in retrospective, paying attention to the technology diffusion process that accounted for their initial success, and contributing arguments for a revision of their historical evolution into a new tool for learning and teaching foreign languages. Includes a survey of existing language laboratory…

Describes a literature-based approach that was used successfully at the University of Cincinnati in a one-quarter advanced undergraduate inorganic chemistry laboratory course. (KHR)

Describes an inquiry-based teaching method implemented in an undergraduate exercise physiology laboratory course. Indicates students' strong, positive feelings about the inquiry-based teaching method and shows that inquiry-based learning results in a higher order of learning not typically observed in traditional style classes. This teaching method…

Described is an activity where students prepare high-quality fossil specimens to demonstrate the theory of evolution. The technique needed for fossil removal, the geologic and paleoclimatic setting, and the fish morphology are discussed. (KR)

Presented is a cytogenic technique which enables students to produce preparations of dividing cells. Described are materials, methods, typical results, and assessment for this activity. The usefulness for a wide range of ages and abilities is stressed. (CW)

Discusses specific problems (arising in the context of a writing center visit) that writing assignments have caused students. Considers problems in teachers communicating objectives with students, unspecific teacher comments on students' papers, lack of examples for the writing assignment, overemphasis on grammatical correctness, unspecified…

Describes various configurations of computer equipment that can be used in public schools. Labs with multiple computers, one computer in a classroom, and minilabs (with three or four computers on a mobile cart) are compared for cost effectiveness, cooperative learning possibilities, instructional effectiveness, usage, security, and flexibility.…

A personal account of the events leading up to the realization that this was a bona fide species is presented. The application of the scientific method in the process of this research is emphasized. (CW)

Described are the design, construction, and uses of two pieces of laboratory equipment. Included are a multipurpose meter, "Calo-pH Meter," and a device for collecting water samples for determining dissolved oxygen content. (CW)

Discussed is the preparation of synthetic brochantite from solution and a thermogravimetric-differential thermal analysis study of the thermal decomposition of this compound. Other analyses included are chemical analysis and IR spectroscopy. Experimental procedures and results are presented. (CW)

Described is the derivation of the relationship between the pH measurement error and the resulting percentage error in hydrogen ion concentration including the use of variable activity coefficients. The relative influence of the ionic strength of the solution on the percentage error is shown. (CW)

Described is an activity in which the interactions between a parasite and its host may be demonstrated using the relationship between yogurt and two species of bacteria. Background information on Koch's postulates is provided. Materials, laboratory procedures, and results are discussed. (CW)