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October 2001, Volume 94, Issue 7

FEATURES

Triangles a la Fettuccine: A Hands-on Approach to Triangle-Congruence Theorems
Patrick Eggleton
An active approach to learning the triangle-congruence theorems.

How Reform Secondary Mathematics Texts Stack Up against NCTM's Principles and Standards
Tami Martin, Cheryl Hunt, John Lannin, William Leonard, Gerald Marshall, Arsalan Wares
This analysis of the five NSF-funded secondary mathematics curricula describes their alignment with the Process Standards and Content Standards in Principles and Standards for School Mathematics. Distinctive features and examples are included.

Using Learning Logs in Mathematics: Writing to Learn
Margaret McIntosh, Roni Draper
Explanations and several examples of learning logs and discussion about the effective use of learning logs in a mathematics classroom so that students have opportunities to communicate mathematically.

Just Say Charge It!
Connie Yarema, John Sampson
The use of a recursive sequence with a graphing calculator to involve students in analyzing credit card debt.

Determining the Endpoint of a Segment
Asif Mustafa
A new method for determining the coordinates of the endpoint of a line segment, given its slope, point of origin, and length.

The Mayan Zeros
Sheila McNeill
The Maya, one of only two cultures to invent a zero concept, used various glyphs as their symbol for zero.

Dynamic Visualizations of Calculus Ideas
Vonder Embse
Three important calculus ideas -- tangent lines, the derivative definition, and the fundamental theorem of calculus -- are explored using Cabri Geometry II.