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In the first of his new series on statistics, Nathan Green explains samples and how bias can skew the conclusions researchers draw from them

5:47 video on the new statistics features on Geogebra 4. Needs to be viewed in full screen.

Welcome to Math Matters, where we employ 21st century learning tools and methodologies to help make math relevant and fun again for both you and your students. This 30-segment video resource focuses on ninth grade Pre-Algebra and Algebra. What makes this unit different from most? It revolves around the world of off-road motorcycle racing. Team HotChalk worked with a group of young HotChalk-sponsored cyclists, videotaping them jumping off ramps along dirt bike tracks and racing up the golden summer hills of a ranch overlooking the ocean in Central California. Courtesy of math teachers Jason Dyer (Pueblo High School, Tuscon, AZ), who scripted out the 'real world' algebra problems, and John Villavicencio (Berkeley High School, Berkeley, CA), who explains the step-by-step solutions in each segment, we are bringing you our first homemade model of YouTube-style learning, "Off-Road Algebra." Our hope is that you'll try out this unit with your class, and let us know what you think. We'd like you to be active participants in helping to shape the digital resources we feel are at the heart of learning in the new century. You may also be interested in our Financial Literacy for Students series.  

"Statistics and Studies from more than 18,000 Sources"

Interactive Math Activities (Grade 6/7)