Presents activities that children can do in the summer to keep their mathematics skills current. (KHR)

Describes how the student community can provide the context for integrating subjects and assessing student knowledge about data collection and analysis. Discusses the change of a teacher's practice through her reflections upon student learning and reform documents. (YDS)

Describes how students can compute and estimate, mentally and rapidly, by using appropriate number relationships. (YDS)

Discusses zeroes at the ends of decimal fractions representing measurements or real-world applications of numbers including precision, variance, and classroom applications. (YDS)

Presents activities in a context that promotes connections between students' experiences and new content and provides visual and/or physical links between informal knowledge and formal math ideas. (YDS)

Reflects on one teacher's strategies for facilitating discourse in his classroom--creating an environment in which student ideas are the basis of discussion yet ensuring productive mathematics. (YDS)

Describes different solution strategies used by students for a problem on the cost of talking on the phone. (YDS)

Describes a few activities and strategies that may be used to actively engage students in their learning. (YDS)

Describes an activity in which students investigate patterns and discrete mathematics found in telephone numbers. (YDS)

Describes how the concept of similar triangles was taught using an optical method of estimating large distances as a corresponding activity. Includes the derivation of a formula to calculate one source of measurement error and is a nice exercise in the use of the properties of similar triangles. (Author/NB)

Explains how conic sections can be approximated by paper-folding activities and proves why they work. (Author/NB)

Presents an active way for students to learn about SAS, SSS, ASA, AAS, and HL in determining congruent triangles. (Author/NB)

Demonstrates how to use graphing calculators to explore rational number approximations to irrational numbers. (Author/NB)

Poses a problem in which readers are asked to determine which pentomino pieces will form a square. (YDS)

Presents student solutions to a problem using different strategies that focus on kitchen geometry. (YDS)