Presents solutions to the Bike Trike problem that appeared in the April 2002 issue of this journal. (Author/NB)

Presents an activity using the cardboard tube from a roll of bathroom tissue or paper towels to help students examine and extend their understanding of the geometric properties of parallelograms. (ASK)

Presents an activity to help students understand and appreciate the use of diagrams, particularly dot plots and stem-and-leaf diagrams. (ASK)

Issues of measurement are fundamental in statistics but are often overlooked in introductory courses. Presents an interactive exercise that encourages students to think critically about how things are measured and to realize that deciding how to measure something can determine the outcome of an investigation. (Author/ASK)

Inspiring exercises are used to guide students at all levels to rediscover the essential meaning of various individual pieces of mathematics. Presents five sets of examples including Abel's identity, Hensel's lemma, finitely generated Abelian groups, Baire's category theorem, and the Weierstrass preparation theorem. (Author/ASK)

Discusses how snack time can be used for mathematical activities. Presents several activities that can be used at snack time. (Author/MM)

Discusses the card game Numero and its use in the classroom to teach mathematics. Includes a pack of playing cards, an instructor's booklet, and an instructional video. Advocates using Numero as a teaching tool as it is adaptable to all ages. (NB)

Uses number sense to involve students in calendar activities based on the Julian and Gregorian calendars. (YDS)

Describes the construction and use of the "fraction computer," a simple manipulative that helps pupils understand how to add and subtract unlike, unrelated fractions. (YDS)

Benjamin Banneker, a self-taught African American mathematician, kept a journal containing a number of mathematical puzzles. Explores four of these puzzles, 200 years later, with the aid of 21st century technology. (Author/NB)

Describes an activity in which students develop personal units of measurement to compare standard and nonstandard measurements. (YDS)

Presents activities on measurement using the metric system. (YDS)

Identifies and addresses fundamental ideas that build the foundations of algebraic thinking and reasoning. Focuses on developing appropriate instructional approaches to these concepts. Explains what is meant by "composite unit" and how this concept framed the development of an instructional sequence to help students make sense of and find meaning…

Discusses the importance of connecting mathematics to real world situations. Presents a mathematical activity in which students decide how many states touch each other by counting the bordering states on the map. (ASK)

Describes the fundamentals of dimensionality and the relationships of the elements in a four-dimensional coordinate system. Outlines a number of analogies between the elements and techniques for creating images of one-point perspective. Describes two of the ways in which realistic imagery can be used to illustrate the relationships in a…