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August 2012, Volume 106, Issue 1

 FEATURES Flying High with the Bird TetrahedronØistein GjøvikAn 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. LambTeaching a visual subject to a visually challenged student inspires strategies that benefit all students in a class. Assessment Can Support Reasoning and Sense MakingChristine SuurtamTeachers can use data from a research project to enhance their classroom assessment practices. Fifteen: Combining Magic Squares and Tic-Tac-ToeJoseph B. W. YeoThe 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 SeriesTongta Somchaipeng, Tussatrin Kruatong, and Bhinyo PanijpanStudents use balls and disks to prove the general formulas for sums of squares and cubes. Using Disks as Models: Two activity sheets (PDF)

 Departments Editorial/From the EditorsFrom the Editorial Panel: New Times, New Challenges Reader ReflectionsReader Reflections - August 2012 Media ClipsMedia Clips: 13th Birthday//No Triskaidekaphobia Here! Mathematical LensMathematical Lens: Thinking outside the Cube Calendar ProblemsCalendar and Solutions - September 2012 Activities (for students)Activities for Students: Using Radioactive Decay to Investigate Exponential Functions Problem SolversProblem Solvers: Solutions to the Tipping Point Problem//The Locker Problem Technology/Technology TipsTechnology Tips: Investigating the Effects of Parameters on Quadratic Functions Delving DeeperDelving Deeper: Sums of Positive Integral Powers For Your Information/Products/PublicationsFor Your Information – August 2012 The Backpage: My Favorite LessonThe Back Page: My Favorite Lesson: Mathematics Autobiographies

 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 DuelOkta 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 CompleteStudents of all ages enjoy playing games. Many games illustrate or reinforce mathematical principles. This game does both. The Learning PrincipleStudents must learn mathematics with understanding, actively building new knowledge from experience and prior knowledge.