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"A research team led by Carnegie Mellon University's Robert Siegler has identified a major source of the gap -- U. S. students' inadequate knowledge of fractions and division. Although fractions and division are taught in elementary school, even many college students have poor knowledge of them. The research team found that fifth graders' understanding of fractions and division predicted high school students' knowledge of algebra and overall math achievement, even after statistically controlling for parents' education and income and for the children's own age, gender, I.Q., reading comprehension, working memory, and knowledge of whole number addition, subtraction and multiplication. Published in Psychological Science, the findings demonstrate an immediate need to improve teaching and learning of fractions and division."

Wiki-answers site for family and club math Q&A

Abstract: "Why do people contribute content to communities of question- answering, such as Yahoo!Answers? We investigated this issue on MathOverflow, a site dedicated to research-level mathematics, in which users ask and answer questions. Math- Overflow is the first in a growing number of specialized Q&A sites using the Stack Exchange platform for scientific collab- oration. In this study we combine responses to a survey with collected data on posting behavior on the site. User behavior suggests that building reputation is an important incentive, even though users do not report this in the survey. Level of expertise affects users' reported motivation to help others, but does not affect the importance of reputation building. We discuss the implications for the design of communities to target and encourage more contributions."

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As you know, teachers know everything. But there are some mere mortals out there who still need to ask questions. This is a fabulous site with over 80 specialist areas to ask questions to the cloud. The community will then help you find an answer. The areas include English and other languages, computing, maths, science, history and much more. http://ictmagic.wikispaces.com/Cross+Curricular

"Schoolhouse Rock may be the standard for music-based educational videos, but YouTube is leading the renaissance of educational songs and dances. Using music as a lure for educational content isn't new, but it's being widely adopted, thanks to the accessible and sharable nature of YouTube."

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A collection of podcasts- you can compile your own selection or link to your own.