Presents several electricity activities for developing student's science process skills of observation and inference. (PR)

Describes an activity appropriate for college or high school students where they make hypotheses about prearranged patterns in a deck of playing cards. (PR)

A buoyancy prediction test was developed to access preschoolers' early understanding of density. Two- to five-year-olds and college students make predictions about the buoyancy of a set of objects that varied in density, weight, and volume. Found that children aged four and five demonstrated patterns of judgment similar to those of the college…

Examined the means used by textbook authors to introduce, define, and explain the mole concept in high school and introductory college chemistry textbooks (n=29). Among the conclusions are that the presentation and definitions of moles in the textbooks are most frequently abstract and theoretical in nature. (PR)

This study found no significant relations between junior high school students' (n=50) prior alternative frameworks on energy and their cognitive levels of operation. Significant differences in learning outcomes were achieved by students (n=29) who had higher cognitive level scores. The extent to which students succeeded in learning the energy…

Describes a series of lessons on spiders that encompasses the varied interests and learning styles of young children. (PR)

Presents activities and techniques for introducing students to the concepts of digestion, chemical reactions, and enzymes. (PR)

Presents an activity where students investigate whether crackers contain sugar (Benedict's test solution) and starch (Lugol test solution) before and after being chewed. (PR)

Describes a student project to build a car powered by the energy in a mousetrap as part of a unit on simple machines. (PR)

Examines biology textbooks from the list of books approved by the state of Texas. Concludes that there are errors, overstatements, and omissions that tend to enhance the plausibility of accepted hypotheses of the origin of life and evolution. (PR)

Suggests that an event-based science curriculum can provide the framework for deciding what to retain in an overloaded science curriculum. Provides examples of current events and the science concepts explored related to the event. (MDH)

Describes relatively simple and inexpensive experiments for demonstrating the immune response to honeybee venom in the American cockroach, "Periplaneta americana." (PR)

Presents a method to teach the concept of a mole that demonstrates the logic of empirical science using the concept of equivalent mass. (MDH)

Describes an activity using a world globe, some golf tees, and a sunny day to help students understand daily and seasonal time differences. (PR)

Explains why groundwater is important and provides basic facts about groundwater. Presents student activities for understanding groundwater and porosity. Includes a color poster. (PR)