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Algebra and Number
Animated Math Factorization
These colourful, visual representations of numbers were inspired by a digital clock. The images get more interesting as the numbers increase, so take your time or use the forward button to move on. Click 'About' on the bottom left to get a deeper understanding of the process.
This website is a gateway to a collection of engaging videos about mathematics and numbers. The Numberphile site features their most recent videos; many more videos are hosted on their YouTube channel, linked from this page.
Pan Balance Numbers
Use this virtual scale to strengthen your understanding of numerical expressions and equality. Instructions for exploring this tool are below the scale.
PBS High School Algebra
High School Algebra takes students on a mathematical journey that starts with evaluating simple single variable expressions, continues with linear systems, and challenges them with graphing multi-variable equations. Students will see how math is used in real-life scenarios, ranging everywhere from pipefitting to designing a dress with a Project Runway winner.
Use this interactive to investigate how changes in the scale factor influence the ratio of perimeters and the ratio of areas between two figures.
TED: A brief history of banned numbers
We've heard of outlawed religious tracts and revolutionary manifestos and censored and burned books, but as strange as it may seem, some numbers have also been considered dangerous enough to ban. This video discusses "illegal numbers".
TED: How many ways are there to prove the Pythagorean Theorem
What do Euclid, 12-year-old Einstein, and American President James Garfield have in common? They all came up with proofs for the famous Pythagorean theorem, one of the most fundamental rules of geometry.
Video: Writing Algebraic Equations
In this video, students learn how writing an algebraic equation can help solve a real-life problem, such as when to buy cat food. There are support activities as well.
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