Afterschool programs have garnered much attention as promising environments for learning where children can engage in rich science activities. Yet, little is known about the kinds of instructional materials used in typical, large-scale afterschool programs that implement science with diverse populations of children. In this study, we investigated…

Describes a 45-minute module to instruct elementary school teachers in teaching the metric system. (CS)

Students calculate the speed of cars moving on a highway as a lab activity. Directions for teachers, objectives, goals, grade level (7-12), materials and procedures are detailed. (JP)

This article gives two methods of resolving natural numbers into prime factors. Depending upon the number that is being resolved, one method may be better to use than the other. However, it is difficult to tell beforehand which is the better method to employ. Examples are given. (Author/MA)

The nature of measurement is discussed in this article with respect to science and mathematics. According to the author, "measurement is the assigning of numerals to objects of thought or perception according to rules." Other definitions, and properties of measurement are included. Two activities exploring measurement are given. (MA)

This article examines the Pythagorean Theorem from a geometric point of view by suggesting some natural extensions of the theorem. The use of a more general theorem to prove a difficult one is suggested, where possible. The article includes figures and proofs. (Author/MA)

The vast majority of people are most familiar with arithmetic in base ten. This article presents a follow-up on a problem with several divisibility tests valid in base ten which are related to Freitag's general test and which follow directly from it. Base 13 is also explored. (Author/MA)

Worksheets are provided which lead students through an exploration of symmetry groups of geometric figures. (DT)

A worksheet is provided for helping students compute the distance a stewardess walks while serving meals to passengers. (DT)

This article provides a manipulative demonstration of the relationship between the squares on the sides of a right triangle. Materials are listed and directions are given for the student. Illustrations are included. (Author/MA)

A game, similar to bingo is described, in which students match names, symbols, and figures. (SD)

Presented are several methods of introducing nondecimal numeration systems to elementary grade students. Various activities for grouping and/or visual displays are used. Games which incorporate nondecimal grouping ideas are also presented. (JP)

Games have become an integral part of many science classrooms. This article describes an electronic game box built by a seventh grade class for use with an adopted version of a television game show. Included are a list of materials, a schematic diagram, and photographs of the completed game box. (MA)

Six areas of learning common to mathematics and science are discussed: sorting and classifying, measuring, using spatial and time relationships, interpreting data, communicating, and formulating and interpreting models. Examples of available materials are cited for each category. (DT)

Many fundamental geometric figures can not be constructed on the familiar square geoboard (e.g., equilateral triangle, regular hexagon). Activities which can be used with an isometric geoboard for study of these figures are catalogued. (SD)