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May 2002, Volume 95, Issue 5

FEATURES

Building Students' Sense of Linear Relationships by Stacking Cubes
Diana Gregg
An instructional sequence which attempts to promote students' understanding of a coordinate system while simultaneously facilitating their understanding of linear relationships.

Queueing Theory: A Rational Approach to the Problem of Waiting in Line
Thomas Edwards
Students' exploration of a particular rational function in the context of people waiting in line for service. The concepts of domain, range, and asymptotes are also developed in that context, as is the effect of changes in input variables on function outputs.