Described is an activity where students determine the effect of different toothpastes on teeth. Students used observational data and pH changes to determine any changes in the teeth. Included are a list of materials, procedures, and results. (KR)

Presented is an activity that investigates the effect of sugar on teeth using cola, sugar solution, and water. Included are the materials, procedures, resources, and alternative lessons. (KR)

Experiments designed to help undergraduate students gain experience operating instruments and interpreting gas chromatography and mass spectrometry data are presented. Experimental reagents, procedures, analysis, and probable results are discussed. (CW)

Discussed are the procedures and results involved in this activity. Student results in undergraduate laboratories indicate high quality results and relative ease of the analysis. (CW)

Described is a demonstration science laboratory at the University of Florida. Discussed is laboratory design, including instructional space, lab stations, sink areas, safety areas, and a storage and distribution area. The impact of this type of design is cited. Diagrams and photographs are included. (CW)

Described is a technique for fiber identification for use by K-6 students. Follow-up activities for elementary and college students are suggested. (CW)

Findings from a survey of 20 liberal arts colleges which did not have graduate programs in chemistry are presented. Discussed are regulations, actions taken and costs of academic laboratories regarding the disposal of hazardous waste. (CW)

Three demonstrations (a mechanical model of chemical equilibrium, a demonstration of Raoult's Law, and a demonstration of permanganate reduction) are presented. Materials and procedures are detailed. (CW)

Procedures for duplicating fossil raindrop impressions are presented. The use of modern and fossil imprints as the basis for qualitative and quantitative lessons in the interpretation of ancient sedimentary features is discussed. (CW)

Described is a study which was developed to find the proportion of cross-dominance in young adults. Procedures and statistical tests are discussed. The tasks used in the assessment of cross-dominance are described. Results indicated that all persons suffered from some cross-dominance. (CW)

Presented are several ideas for projects involving ladybird beetles. Discussed is background information about the insects; and projects involving life histories, intra-specific variation, taxonomy, genetics, behavior, ecology, habitat surveys, population biology, and overwintering biology. Lists 12 references. (CW)

This paper shows that more pupils take biology than the other sciences in England. Biology attracts pupils of all abilities and girls in particular. Performance data reported suggests that the study of biology is not as effective in enhancing science performance as are the physical sciences. (CW)

The use of actographs for studying animal activity is discussed. Described are running recorders for rodents, perching and feeding recorders for birds, and tilting box recorders for studying the movement of reptiles, amphibians, and arthropods. (CW)

The procedures, data analysis, and applications of this laboratory activity are detailed. An example of the results obtained is provided. Sources of the tadpoles and their treatment are discussed. (CW)

Introduces an interdisciplinary activity using a cola drink. Describes the lesson plan, including objectives, procedures, evaluation, projects, and conclusions. Provides two laboratory sheets containing problem, hypothesis, materials, procedure, observations, and conclusions, vocabulary table, and data table. (YP)