Provides the methodology put forth by Moore and Kraus to separate Co++ from Ni++ in an 8M HCl solution. Notes that cobalt(II) forms a wide variety of anionic complexes. Points out that as the solutions leave the exchange column the color bands of green, blue, and pink are easily seen. (MVL)

Describes a chemistry club project. Explains the three goals: to enhance hands-on science in elementary classrooms, to encourage females to enter the field of science, and to encourage high school students to consider teaching as a career choice. Provides an outline and examples of the characters and demonstrations. (RT)

Describes a variety of approaches for forming partnerships among high schools, universities, and industries for solving the problems that face precollege science education. (YP)

Describes three demonstrations: (1) "A 'Rocket' Cart" (using a fire extinguisher and a child's truck); (2) "Angular Momentum Conservation" (providing materials and calculations); and (3) "Cavendish Experiment" (including the building method and examples of calculations). (YP)

Discusses three broad classes of magnetic behavior: diamagnetic, paramagnetic, and ferromagnetic. Presents a simple lecture demonstration using an overhead projector to synthesize triiron tetraoxide and to show its interaction with a magnetic field and comparing it to a paramagnetic material. (MVL)

Explains the operation of five relative humidity sensors: psychrometer, hair hygrometer, resistance hygrometer, capacitance hygrometer, and resistance-capacitance hygrometer. Outlines the theory behind the electronic sensors and gives computer interfacing information. Lists sensor responses for calibration. (MVL)

Presents an overview of 15 laboratory exercises used in an experimental ecology laboratory. Stresses that these exercises require no field work by students and are geared toward testing hypotheses. Suggests the use of these exercises in high school as well as college. (CW)

The Center for Business Information and the Goizueta Business School at Emory University (Georgia) tested desktop videoconferencing as a means to deliver reference services, including consultation, documentation, training, and sharing of CD-ROM databases. Provides a brief overview of the technology, describes project beta testing, and discusses…

Reviews the objectives of laboratory work in chemistry education, current laboratory practice, and factors likely to impact on the nature of laboratory work in the future. Proposes that more investigation-style laboratory work be provided in order to foster the development of students' investigation skills. (Author/MKR)

Explains the advantages of having students write research proposals before conducting experiments for science fairs. Describes what should be in the research proposal. (PR)

Describes an experiment where elementary students determine the optimum angle of inclination for the greatest amount of distance a marble will roll when accelerated down an inclined plane. (PR)

Describes an experimental sequence using the force probe to develop the relationship between net force and acceleration. (PR)

Two experiments examined how learning from different media--real pulley systems or simple line diagrams--affected mechanical learning and problem solving. The first showed that subjects' learning improved equally in both cases; all subjects showed an increase in quantitative understanding as they learned; and subjects manipulating real pulley…

The 9 articles of this theme issue stem from a project on alcohol and drug abuse that involved 14 projects, 10 of which began with randomized clinical trials. These papers describe implementation problems associated with experimentation in field research and the focus on ensuring internal validity. (SLD)

Presents performance assessments, written by a team of Wisconsin science teachers, designed to see if students know, have practiced, and are able to perform the skills associated with science problem solving. (JRH)