Discusses explorations that students can engage in using the interstate highway system. (MKR)

Tells a story written by a sixth-grade student to illustrate the various kinds of numbers encountered in elementary arithmetic. (MKR)

Describes John Snyder's current interest in mapping, provides worksheets for a student map-projection activity, and explains how maps have been used throughout history. (MKR)

Describes a three-week summer institute for middle school teachers in which they explored quantitative reasoning, the notion of variable, various algebraic concepts, and proportional reasoning. Activities included journal writing, field experience, and sharing time. (MKR)

The purpose of this lesson on classifying triangles is to aid students' discovery of the different characteristics of equilateral, isosceles, and scalene triangles through computer explorations using Geometric Supposer or GeoExplorer software. (MKR)

Presents an activity using logic mystery stories that students solve by asking yes-or-no questions. Helps students discover the reasoning behind good questioning and provides for practice with instant feedback from the teacher. Includes sample stories. (MKR)

Presents a one-day, integrated activity in which a class monitors several students simulating a NASA space-shuttle flight. Includes space-shuttle crew application and space-shuttle time line. (MKR)

Using the movie Star Wars as inspiration, an activity is presented to introduce students to water's cohesiveness and how the surface tension of water can be disrupted. (MKR)

Presents an activity exploring the basics of atomic structure using the theme of the Addams Family. (MKR)

Presents an introduction to a unit on the periodic table in which students are asked to assume the roles of the element families. (MKR)

Presents authentic assessment laboratory activities in which students measure the amount of sugar in bubble gum and test the lasting power of soap bubbles. Includes scoring rubrics. (MKR)

Presents a project in which one science class, curious about large numbers, created one million marks on paper. Discusses other concrete representations of one million and other large numbers. (MKR)

Presents 12 discrepant event demonstrations on various concepts related to density to make physical science more interesting and fun. Demonstrations are organized into the "5E" instructional model (engagement, exploration, explanation, elaboration, and evaluation). (MKR)

Presents a two-part activity which gives middle-level students concrete experiences with two different aspects of the concept of diffusion. (MKR)