Describes a classroom inquiry into expressing the number pi as the limit of a sequence of different ratios using relationships among coins and the radius of an inscribed circle. (KHR)

Describes an activity designed to demonstrate the birthday paradox and introduce students to real-world applications of Monte Carlo-type simulation techniques. Includes a sample TI-83 program and graphical analysis of the birthday problem function. (KHR)

Presents a problem entitled "Puzzling Prices" for grades K-6. Students are given a combination of price tags and must determine the different amounts of money that could be made using different combinations. (KHR)

Describes an activity in which children are given a visual indicator of a fraction with oil-and-water. (Author)

Describes how students connect culture and mathematics by using tessellating and symmetrical patterns in the designs of architecture, pottery, blankets, and baskets as models to create geometric designs for a quilt. (Author/YDS)

Presents a way of using greeting cards created by graphing calculators to teach the transformation of functions. Illustrates the steps of making a calculator greeting card and students' descriptions of transformations. (KHR)

Describes how a 2nd grade class learned to add and subtract effectively by packing and unpacking "Aunt Mary's candies." (KHR)

Features a mathematics lesson or experiment that models probability using attribute sets and is evolved from reading literature to students. (KHR)

Demonstrates the transformations that are possible to construct a variety of magic squares, including modifications to challenge students from elementary grades through algebra. Presents an example of using magic squares with students who have special needs. (YDS)

Presents questions, explorations, and problems centered on data and surveys related to ice cream. (YDS)

Describes a lesson plan in which students apply their mathematical intuition to determine win-loss possibilities of teams in a sports league and develop a formula for calculating the magic number for clinching first place. (YDS)

Presents a problem and a variety of proportional reasoning strategies used by students to solve the problem. (YDS)

Presents the "Food for Thought" problem and discusses different approaches used by Algebra 1 students to solve the problem. (YDS)

Describes how middle school mathematics can be integrated with social studies using the United States map. (YDS)

Explores the mathematics of flight. Also contains a student worksheet. (YDS)