The "Research in Practice Series" is a practical, easy-to-read resource, offering effective new approaches for those challenging issues which arise in the care and education of young children. Early Childhood Australia's "Research in Practice Series" is an essential resource for those involved in the early childhood field.…

The proportion of adolescents in the United States who are obese has nearly tripled over the last two decades. At the same time, schools, often citing financial pressures, have given students greater access to "junk" foods and soda pop, using proceeds from these sales to fund school programs. We examine whether schools under financial pressure are…

Software designed to promote the use of open-ended investigations in science education was evaluated in a study of whether using case-based simulation enhances students' understanding of ethical issues and data interpretation in science. The software was a DNA gel electrophoresis simulation that enabled students to conduct simulated genetic tests.…

Discusses various ways science can be taught using microcomputers, including simulations/games which allow large-scale or historic experiments to be replicated on a manageable scale in a brief time. Examples of several computer programs are also presented, including "Experiments in Human Physiology,""Health Awareness…

Compares two methods (batch and continuous) in which microorganisms are used to produce industrial chemicals. Describes batch and continuous stirred-tank reactors and offers reasons why the batch method may be preferred. (JN)

Based on findings from four studies (conducted between 1928 and 1979) of adopted children, discusses the differential effects of heredity and environment on intellectual development. (GC)

Recommendations are given for obtaining high quality preparations of chromosomes with relatively little equipment using an improved Feulgen-squash technique. (Authors/SA)

Government regulation of recombinant DNA research is addressed. Issues discussed include the potential of such research; National Institutes of Health guidelines; federal, state, and local regulation; the controversy over self-regulation; first amendment protection for scientific research; and problems in drafting legislation. (JMD)

Parent-based assessments of vocabulary, grammar, nonverbal ability, and use of language to refer to past and future were obtained for 8,386 twins at age 2. Of the children who had early language delay, 44.1% had persisting language difficulties at 3 years and 40.2% had persisting language difficulties at 4 years. (Contains references.) (CR)

Presented are the three main theories that describe the pattern of evolution of geographic variants of H. sapiens--the multiregional model, the out-of-Africa model, and the gene-flow or hybridization model. The contributions of geneticists, paleoanthropologists, and the history of fossils are included. (KR)

Investigates factors, including heredity and culture, contributing to exceptional Asian American academic achievement. Proposes the concept of relative functionalism, under which Asian Americans perceive and have experienced restrictions in upward mobility in occupations unrelated to education. Consequently, educational achievement assumes…

Uses multidimensional scaling and clustering analysis of the co-citation patterns of 58 authors to explore the intellectual organization of population genetics and related specialties. Concludes that co-cited author mapping, with the author as the unit of analysis, is likely to complement studies of informal communication networks. (SR)

Describes the use of the polygenic trait of total fingerprint ridge count in the classroom as a laboratory investigation. Presents information on background of topic, fingerprint patterns which are classified into three major groups, ridge count, the inheritance model, and activities. Includes an example data sheet format for fingerprints. (RT)

Discusses the origins of biological risks and their potential consequences for prepregnancy, prenatal, perinatal, and postnatal periods. Presents epidemiological data. Addresses issues of assessment of infant development and interventions provided for infants whose development is at risk. Highlights goals for prevention. A nationally derived data…