Math and science simulations. free trial. costs$$
Great how-to math videos. Math Playground was created by teachers who are passionionate about math and technology. Many of the activities on the site were inspired by the hundreds of students we have had the pleasure to teach over the years. Other activit
Mathematical Moments are 8.5" x 11" pdfs, available on many different topics in science, nature, technology, and human culture. Some have been translated into other languages, and some feature podcast interviews with experts in the field. Use the pulldown lists below to select the Mathematical Moment you're looking for.
What is Knowitall.org? Knowitall.org is ETV's educational Web portal, a collection of fun, interactive websites for K-12 students, teachers and parents.
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Calculation Nation™ uses the power of the Web to let students challenge opponents from anywhere in the world. At the same time, students are able to challenge themselves by investigating significant mathematical content and practicing fundamental skills. The element of competition adds an extra layer of excitement.
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Wolfram|Alpha's long-term goal is to make all systematic knowledge immediately computable and accessible to everyone. We aim to collect and curate all objective data; implement every known model, method, and algorithm; and make it possible to compute whatever can be computed about anything. Our goal is to build on the achievements of science and other systematizations of knowledge to provide a single source that can be relied on by everyone for definitive answers to factual queries.