Described are laboratory methods for enumerating microorganisms in food. These methods are utilized to determine if foods are potentially hazardous to the consumer due to high concentrations of microorganisms. Discussed are indicator organisms, including coliforms, interococci, yeasts, and molds; food poisoning organisms (staphylococci and…

Described are experiments used in the "Physical Science and Man" course at Hartley CAE which enable determinations of efficiencies of two energy conversion processes, namely, electricity into heat and burning gas to produce heat. Activities for comparing the processes are suggested. (DS)

Reported are the results of a survey conducted to identify the problems of science educators in small and large institutions and perceived solutions to these problems. Recommendations that could assist in ameliorating the problems are also presented. (HM)

Described are eight microcomputer systems that are suitable for computer-aided instruction (CAIDI) in chemistry. Specific instructional applications are described to illustrate the wide variety of systems available and their adaptability to problems faced by chemistry teachers. (BT)

Describes a lecture demonstration illustrating Charles's Law with a balloon-balance thermometer. The technique allows a determination of the absolute minimum temperature to within an accuracy of 10 percent of the exact value: -273.15 degrees Celsius. (BT)

This is a set of recommendations concerning maximum teaching loads of physics teachers at high schools, two-year and four-year colleges. (Author/SA)

Describes a unit developed to introduce chemical technology students to basic library research using the resources related to chemistry. The unit consists of a lecture on basic library organization, bibliography and abstracting, a lab with hands-on bibliographic searching, and a follow-up independent exercise in research. (BT)

Describes six laboratory procedures for preparing polymers which have been used in a course for undergraduate industrial arts students, who have a concentration in plastics technology but have not taken more than one year of college chemistry. (BT)

Discussed is the effectiveness of using analogies in chemistry instruction. Students' mathematics anxiety, spatial visualization skill, and proportional reasoning ability were found to be important aptitudes for determining chemistry achievement. The relationship between analogs and algorithms is described. (KR)

Outlined is a specific computer application which can be used to analyze data on plant community composition from the point quarter sampling method. Procedures, examples of spreadsheets prepared in this manner, and evaluation of the activity are presented. (CW)

A collection of Molecular Orbital (MO) programs that have been integrated into routines and programs to illustrate MO theory are presented. Included are discussions of Computer Aided Composition of Atomic Orbitals (CACAO) and Walsh diagrams. (CW)

Presented is an experiment which demonstrates principles of experimental design, solubility, and crystal growth and structure. Materials, procedures and results are discussed. Suggestions for adapting this activity to the high school laboratory are provided. (CW)

Reviewed are six computer programs which may be useful in teaching college level chemistry. Topics include dynamic data storage in FORTRAN, "KC?DISCOVERER," pH of acids and bases, calculating percent boundary surfaces for orbitals, and laboratory interfacing with PT Nomograph for the Macintosh. (CW)

Stressed is the importance of helping students to become independent of their instructors in gathering information. Information-gathering skills are enumerated and teaching methods are suggested. A brief annotated bibliography and definitions of materials are provided. (CW)

A course designed to teach library research skills to engineering students is described. Discussed are the objectives, method of instruction, student performance, and evaluation for this course. (CW)