Described are the apparatus and procedures needed for a demonstration of a determination of the polarity of charges carried by individual ground flashes of lightning. Discussed are materials, apparatus construction, and experimental results. (CW)

Described are the apparatus and procedures needed for this correction technique using a microcomputer interface. Discussed are materials, apparatus construction, and experimental results. (CW)

Interactive science and technology centers are described that emphasize "hands-on" science. Examined are the outreach programs offered by many centers which include traveling exhibitions and published resource materials. Examples of follow-up activities to a center visit are included. (KR)

Examined is the contribution that hands-on, interactive centers can make to science education. The characteristics of informal and formal learning are compared and discussed. (KR)

Advocated is the use of interactive centers to supplement existing classroom laboratory experiences. Activities found in the center and modified classroom versions are described. The problems that arise when primary students meet sophisticated exhibits is discussed. (KR)

The impact of enhanced observation or enhanced prediction on scientific reasoning about heat energy and temperature problems was investigated. Instruction was successful in improving prediction and observation skills in the microcomputer-based laboratory environment. (CW)

Suggested is a methodology for teaching and assessing group problem-solving with secondary school pupils. The results of a study conducted on this method are presented. The problem-solving approach used and operational definitions for assessment are listed. Scenarios for problem-solving activities are included. (CW)

Described are the camps, competitions, and tests of the U.S. National Chemistry Olympiad. International competition, local exams, participating high schools, and national exams are highlighted. A summary of test results from the 1988 national examinations are presented. (CW)

Describes a year long laboratory program for third, fourth, and fifth graders. States the goal of the program is to demonstrate what chemistry is, how it is done, and why it is fun and interesting. Provides a syllabus of the experiments and lists educational objectives. (MVL)

Described is a program for two-week, tuition-free courses offered twice a year dealing radiation and radioactivity. Laboratory exercises, tours, schedules, enrollment and accreditation, and staffing are discussed. (CW)

Discusses the use of computers in chemistry courses at the United States Military Academy. Provides two examples of computer projects: (1) equations of state, and (2) solving for molar volume. Presents BASIC and PASCAL listings for the second project. Lists 10 applications for physical chemistry. (MVL)

Discussed are the advantages and processes of making collections with children. An activity for making a classroom collection (herbarium folios) is described and includes materials and procedures. The processes of collecting and classifying are stressed. (CW)

Six paper and pencil activities on marine ecology are presented with answers. Included are a food pyramid, a maze, a find-a-word puzzle, a sea food chain, a crossword puzzle, and a predator-prey puzzle. (CW)

Describes a science experiment in which the heartbeats of mammals can be counted and graphed as measurable data by the computer. Provides information on materials needed, pre-lab activity worksheet, and follow-up activities. (RT)

Describes an activity in which students monitor the plastic waste production in their households, research its effects on freshwater and marine life, and propose ways to lessen the problem. Provides objectives, background information, materials, procedures, extension activities, and an evaluation for students. (Author/RT)