Indicates that periodic table users will see changes in group notation as publishers and authors adopt revisions that already have been made or are being made. The revisions seek to remove ambiguities that have existed in that notation. A sample table is included which shows both old and new notations. (JN)

A group test of formal thinking was administered to all grade 11 entrants in National High Schools in Papua New Guinea, and readministered two years later. Only 8 percent operated formally on the initial test; two years later, 18 percent were operating formally and 37 percent were at a transition stage. (MNS)

Discusses the nature and effects of the El Nino/Southern Oscillation phenomenon. Indicates that new understanding of the phenomenon from current data will provide a global view of climate that has never before been within reach. (JN)

Describes how a planetarium was constructed on the ceiling of a traditional physics laboratory. Similarities and differences between the "poor man's" planetarium and other planetariums are noted. (JN)

Discusses a laboratory exercise (suitable for the day before spring vacation) involving use of a hard-boiled egg to stimulate student responses to questions on the effect of adding salt to the water, formation of iron sulfide, ease of peeling, and gas laws. Additional experiments are included. (BC)

A scavenger hunt is used as an instructional strategy during the final weeks of the school year. Procedures used, types of questions and problems asked, and student reaction are discussed. (JN)

Provides examples of animals in which growth occurs without cell division. Indicates that this phenomenon (called cell constancy or eutely) is an oddity of development that has arisen independently in several animal groups. (JN)

Described are panning and jigging methods of performing chemistry experiments and demonstrations to illustrate physical separation, location, identification, and concentration of minerals. (SL)

Presented are recommendations of English mathematicians and physicists for ensuring that there is an optimum match in the math/physics interface in secondary schools. Recommendations stress the need for increased cooperation between the disciplines. (SL)

Presents background material on the National Association of Geology Teachers' Best Earth Science Teacher Awards for 1975-76. (SL)

Described is the program of science education utilized by secondary schools in Tasmania, Australia. Included is a description of the science syllabus currently being adopted by the schools. (SL)

Discusses the operation and characteristics of the power transformer, rectifier, filter, and regulator of an electronic power supply. (JR)

Suggest that science is sterile and irrelevant to most secondary school students, and that the purposes of science education should be reexamined and more stimulating and relevant approaches adopted. (JR)