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Volume 103, No. 4, November 2009 		MT2009-11-cover
Focus Issue: Proof
Laying the Foundation
Second Look: Geometric Proof

FEATURES

Ten Things to Consider When Teaching Proof
Michelle Cirillo
What I wish I had known about teaching proof before I taught geometry

Proof Mapping
Leanne A. Linares and Phil R. Smith
Constructing geometry proofs through group- and self-reflection helps develop successful arguments by revealing underlying thought processes.

Japanese Logic Puzzles and Proof
Jeffrey J. Wanko
Hashiwokakero, also known as Bridges, is one of several types of Japanese logic puzzles that help students establish proof-readiness skills.

Soft Drinks, Mind Reading, and Number Theory - FREE Preview!
Kyle T. Schultz
A mathematical proof inspired by a mind-reading trick found online can ready algebra students for more rigorous thinking.

Learning Deductive Reasoning through Games of Logic
P. Janelle McFeetors and Ralph T. Mason
By exploring, analyzing, and convincing, students can develop deductive reasoning strategies during preproof experiences.

Preparing for Formal Proofs in Geometry
Art Johnson
Conclusion quickies and mystery problems precede and prepare for formal proof in geometry.
Share Your Ideas - Calls for Articles
See all current MT Calls for Articles

 The Back Page: My Favorite Lesson
DEPARTMENTS
Reader Reflections
Online Extra: Solution

Media Clips
Water Drop; Dolphin Kick

Mathematical Lens
Woodstock Revisited
Online Extra: Additional Photo (PDF)

November Calendar and
Solutions to Calendar		 Connecting Research to Teaching
Count on Number Theory to Inspire Proof
Online Extra: More Sophisticated Arguments of Classmates - Another Example (PDF)

Delving Deeper
One Cut, Two Halves, Three Questions

For Your Information

The Back Page: My Favorite Lesson
Medians of a Triangle: The Search for Invariants
Second Look - Geometric Proof

Playing with Dominos: Proof by Induction
February 2009, Volume 102, Issue 6, Page 426 - Mathematics Teacher

Key Ideas and Insights in the Context of Three High School Geometry Proofs
May 2006, Volume 99, Issue 9, Page 644 - Mathematics Teacher

Sherlock Holmes, Geometry Proofs, and Backward Reasoning
May 2006, Volume 99, Issue 9, Page 544 - Mathematics Teacher

Pieces of Proof
Illuminations Lesson: An intermediate step between understanding postulates and theorems in geometry and writing proofs using them. Students put together the statements and reasons to build a formal proof.

Principles and Standards for School Mathematics
Reasoning and Proof Standard for Grades 9-12

Free Previews

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