Presents an exact equation for calculating the volume of titrant as a function of the hydrogen ion concentration suitable for calculation on a hand held calculator. (SL)

Presents a convenient notation for powers of ten and logarithms, a demonstration of the nonstoichiometry of nickel oxide, a simplification for obtaining Russell-Saunders term symbols, and a scheme for biochemistry laboratory experiments. (SL)

Uses the Dresden and Feiock quantum mechanical Kac ring pedagogical model to illustrate formal results and approximation limitations of nonequilibrium statistical mechanics. (SL)

Describes the rise of the systematic method of tackling problems of multiple equilibria to calculate the complete titration curves for acids and bases. (SL)

Students (233) in five Israeli high schools were tested to determine the relationship of IQ and achievement, attitudes, and manipulative and observational skills in chemistry. Students indicating a desire to pursue science study were found to differ signicantly their non-science oriented couterparts only on cognitive ability measures. (CP)

Schematically depicts the variety of uses the mole concept has for 0-level chemistry. (CP)

A study of 147 Westinghouse Science Talent Search winners classified 57 subjects as independent problem finders. They were asked to select five of the 31 factors in Guilford's Structure of Intellect model which best described the process of choosing their research question. Implications for educating secondary science students are discussed. (VW)

Describes a physics experiment which demonstrates the pitfalls of assuming that a model which represents an ideal system is applicable to a real experiment. Explains how the failure may give greater understanding of the problem and may lead to improvements in the model. (ML)

Provides a reproducible flow chart to aid students in problem-solving skill development. Steps include: determining what is asked; choosing a relationship; and checking validity of the relationship. Teacher notes are given to improve instruction. (DH)

This study describes strategies fifth- and sixth-grade children used to solve the problem of determining how to control a "vehicle" they "drove" by pressing particular keys on a computer. The problem involves identifying or discovering a set of cause-effect relationships. (Author/JN)

Describes an activity which introduces students to the nature and challenges of paleoanthropology. In the exercise, students identify diagrammed bones and make interpretations about the creature. Presents questions and tasks employed in the lesson. (ML)

Reviews articles and books which focus on topics and strategies related to problem-solving. Also describes the Kepner-Tregoe industrial training program. This program contains many problem-solving ideas and strategies appropriate for the college level. (JN)

Describes a project-type experiment in which students each try to find the color indicator present in a particular flower. The philosophy of conducting such an experiment and procedures used are included. (JN)

Four papers are reviewed. They include a description of how instructional modules and small group problem-solving (PS) in a second-year plant anatomy course produced excellent PS skills and various ideas on PS in the context of chemistry. Also reviews guided-design as a strategy to help develop PS skills. (JN)

Methods used to investigate problems in the sciences include building-up strategies, insight, and change (or serendipitous discovery). Discusses appropriate learning experiences for the undergraduate science students so they are more likely to benefit from the second method of scientific discovery as they make a career in their chosen field. (JN)