Marbles were successfully used to help primary students develop concepts of motion. Marble-unit activities began with shaking and rattling inference bags and predicting by listening just how many marbles were in each bag. Students made qualitative and quantitative observations of the marbles, manipulated marbles with a partner, and observed…

Provides directions for the construction of giant plastic cells, including details for building and installing the organelles. Also contains instructions for preparing the ribosomes, nucleolus, nucleus, and mitochondria. (DDR)

Presents an activity that involves the collection and analysis of biological data, research into the social and medical history of a community, and the development of skills in oral and written communication. (DDR)

Describes a laboratory procedure using vanilla and chocolate sandwich cookies that can be used to illustrate independent assortment either during meiosis or during a dihybrid cross. (DDR)

Explains how games can be used to stimulate interest and aid conceptual understanding. Focuses on working with Year Six children and simulation exercises designed to support understanding of feeding relationships and food chains. (DDR)

Presents an open-ended experiment designed to observe a range of processes and effects associated with electrolysis of an aqueous solution of copper sulfate. Lists materials and procedures. (DDR)

Describes the use of a theoretical framework of DNA topology and a simple method for modeling structures as successful ways of teaching students about DNA supercoiling. (WRM)

Presents a relatively short, simple, safe, and visual method for student preparation of chlorine, bromine, and iodine using reactants and glassware that are easy to obtain and handle. (WRM)

Explains how to create a paper replica of the Bighorn Medicine Wheel, an ancient timepiece thought to have been constructed by the Lakota Indians around 1700 A.D. The Bighorn Wheel uses four key seasonal stars as well as the solstice sunrise and sunset to mark the passage of time through the summer. (WRM)

Discusses mathematical shortcuts that can be used to estimate the pH of most aqueous solutions. (WRM)

Presents a simple qualitative system for sketching all manner of acid-base titration curves, requiring only the approximate values of the acid or base ionization constants. (WRM)

Argues that students lack an understanding of how research is done. Proposes a science exercise that provides authentic research experience for ninth-grade students in an advanced-placement chemistry class. (CCM)

Describes the Science and Math Investigative Learning Experiences (SMILE) program which developed a two-part curriculum for teaching field-based science through hands-on activities. Presents two of the favorite camp activities which can be used in a variety of locations. (CCM)

Presents hand-on, standards-based activities in language arts, math, science, and social studies, including a daily almanac; bookmark buddies; word palettes; bowling for numbers; math thought teasers; plant puzzles; fingerprint fun; a travel bureau; and an end-of-the-year bulletin board of people involved in interesting activities. Reproducible…

Describes some simple experiments related to the properties of crystals. Illustrates isomorphism using single crystals of alum. Presents experiments for determining how various mixture compositions affect the growth of salt crystals. (WRM)