Describes an elementary arithmetic project that involves reading, writing, and counting skills. Students collaboratively create a tooth-shaped book designed to strengthen their counting skills as they celebrate losing baby teeth. The article also includes other activities to further extend the project. (SM)

Outlines the embedded mathematics in which important but hidden calculations are being done for communications in commerce. Explains two key concepts, error detecting codes and error correcting codes. Illustrates these ideas using two familiar examples, barcodes and ISBN numbers. (ASK)

Presents an activity in which students study geometrically the structure of tiling in a cafe in Bristol. (ASK)

Outlines a geometry task that uses computers to transform some quadrilaterals into other quadrilaterals. (ASK)

The graphing calculator affords the student in analysis a powerful tool to extend visualization, which was previously limited to textbook illustrations and time-consuming constructions. Provides illustrative examples used in initial classroom presentations of several topics including convergence and in student explorations of these topics. (ASK)

Provides classroom examples of the pervasive influence of the history of mathematics in the school curriculum at all levels. (Contains 25 references.) (ASK)

Reports on rich mathematical activities that integrate different mathematics strands and learning. Describes how to introduce the task and the classroom setting, set up the task, and continue the investigation. Presents student work samples. (ASK)

Discusses the mathematical features of the Royal Greenwich Observatory. Describes measuring latitude and longitude, pendulum clocks, telling time, and chronometers. (ASK)

Presents an activity that uses combinations of Cuisenaire rods of length one or two to make various lengths and trains. (ASK)

Introduces problems on rhombuses and dodecagons and their solutions. Emphasizes the angles and symmetric features of these geometric figures. (ASK)

Presents three activities on quadratic relationships, their graphs, and their formulas. (ASK)

Presents a common knowledge puzzle in which it becomes possible to reason about other people's responses to the puzzle. (ASK)

Presents four activities in which students cut out and assemble pieces to create Celtic designs. (ASK)

Presents an activity to introduce the concepts of average rate change and instantaneous rate of change of a function and to explore the relationship between the value of the exponential function and its instantaneous rate of change. (ASK)

Discusses the commercial for Skittles candies and asks the question "How many flavor combinations can you find?" Focuses on the modeling for a Skittles exercise which includes a brief outline of the mathematical modeling process. Guides students in the use of the binomial theorem and Pascal's triangle in this activity. (ASK)