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August 2012, Volume 106, Issue 1


Flying High with the Bird Tetrahedron
Øistein Gjøvik
An origami activity can lead to rich tasks in several branches of mathematics.

Flying High: Two appendices (PDF)

Teaching Geometry to Visually Impaired Students- FREE PREVIEW!
Christine K. Pritchard and John H. Lamb
Teaching a visual subject to a visually challenged student inspires strategies that benefit all students in a class.

Assessment Can Support Reasoning and Sense Making
Christine Suurtam
Teachers can use data from a research project to enhance their classroom assessment practices.

Fifteen: Combining Magic Squares and Tic-Tac-Toe
Joseph B. W. Yeo
The game Fifteen can motivate students to develop problem-solving skills and mathematical thinking.
Second Look:
Games that Promote Both Number Fluency and Critical Thinking

Using Disks as Models for Proofs of Series
Tongta Somchaipeng, Tussatrin Kruatong, and Bhinyo Panijpan
Students use balls and disks to prove the general formulas for sums of squares and cubes.

Using Disks as Models: Two activity sheets (PDF)

Second Look - Games that Promote Both Number Fluency and Critical Thinking

Teacher to Teacher: What Is the Name of This Game?
An easy-to-learn game that focuses on building number and number sense as well as algebra at the more advanced level. Variations of this game are also described, thus allowing for increased challenge. Teacher to Teacher is a department written by teachers for other teachers. This department features implications for improving instruction aimed at ideas teachers can use in their own classrooms, schools, and communities.

Illuminations Applet: Deep Sea Duel
Okta challenges you to a duel! That crazy octopus wants to play you in a game where the first person to choose cards with a specified sum wins. You can choose how many cards, what types of numbers, and Okta's level of strategy

Game of 9 Cards Complete
Students of all ages enjoy playing games. Many games illustrate or reinforce mathematical principles. This game does both.

The Learning Principle
Students must learn mathematics with understanding, actively building new knowledge from experience and prior knowledge.