MathsClass

Finding the Formula for the Arc Length of a Circle 21 Feb 2013

A GeoGebra applet for finding the formula for the arc length of a circle.

Graphing Quadratics made Ridiculously Easy (Mathematics: James Tanton) 21 Feb 2013

Don't memorise the vertex formula as part of graphing a quadratic. Just go ahead and graph the thing. Let me show you the natural and easy way to do it!

Missing Numbers (Addition) 21 Feb 2013

This interactive whiteboard resource is useful for introducing children to the concept of having the answer but not one of the numbers in the question.  An addition is shown with an answer but not one of the numbers being added.  The “20″ button generates questions with an answer below 20.  The “100″ button generates numbers with an answer below 100.

Hollywood Hates Math 21 Feb 2013

A supercut of moments in TV and cinema where characters downtalk math.

Pi and the size of the Universe – Numberphile 21 Feb 2013

 Pi is famously calculated to trillions of digits – but Dr James Grime says 39 is probably enough.

Approximating Integrals: Trapezoid Rule 19 Feb 2013

In this video, I show the formula and give one simple example of using the Trapezoid Rule to approximate the value of a definite integral.

Approximating Integrals: Simpsons Rule 19 Feb 2013

In this video, I give the formula for Simpson's Rule, and use it to approximate a definite integral.