Argues that intensive agriculture restricted to suitable lands will be required in the future due to global population growth, declining food prices, and extreme poverty. Discusses the challenge of balancing environmental care with food production. (DDR)

Defines geodiversity, compares it to biodiversity, and discusses the mineral classification system. Charts the discovery of new minerals in Australia over time and focuses on uses of these minerals in technological advances. (DDR)

Outlines an approach to teaching science to a group of 15 eighth-grade special needs students who are either intellectually impaired or have specific learning disabilities. Approaches to issues such as appropriate content and behavior management are described. (DDR)

Explores the changing nature of upper secondary school science subject enrollments over two decades. Discusses the fact that enrollments in chemistry, physics, and biology increased up until 1991 and declined from 1992-1995. (DDR)

Recommends that teachers prevent plagiarism by structuring research assignments so that copying material from references is very difficult. Suggests that teachers be specific, select relevant topics, and insist on full referencing. (DDR)

Provides resources for those who teach weather in science class. Focuses on Internet resources that describe the weather pattern around Australia. (DDR)

Describes how to measure the penultimate laboratory speed, a stress wave velocity in a solid rod. Also includes background information on stress waves, apparatus, and procedures. Employs a homemade interface for the IBM platform. (DDR)

Outlines three activities for different areas of biology that can serve as motivators for students or as demonstrations. Each activity is easy to organize and uses available materials. Topics include evolution, anaerobic respiration, and heat loss. (DDR)

Describes a worksheet developed to enable students to learn the rules for assigning oxidation states. Employs an active learning approach. Also includes a copy of the worksheet. (DDR)

Describes a study of Indian and Fijian pre-service primary teachers that reveals how many hold alternative conceptions of fundamental scientific concepts. Focuses on conservation of matter. (DDR)

Briefly discusses the history of major ideas about the universe, such as nebulae, black holes, and the Big Bang theory. (MLH)

Discusses some geographical and racial cancer patterns, the role of genetics in cancer, and methods for testing carcinogens. (MLH)

Describes the Teacher Orientation to Science Instruction (TOTSI) instrument, which comprises a set of statements on eight characteristics of science teaching. TOTSI evaluates teacher assumptions to indicate what type of curriculum best suits the teacher's abilities and preferences. (MLH)

Describes a laboratory and field project in which students compost garbage to trace the transfer of matter and energy through the biosphere. (MLH)

Discusses the reasons why scientists choose science, and why these factors may not be operative in the career choice of blacks. Factors include role models, early exposure to science, and positive image of science. (MLH)