University of Texas at Austin
Euler's Method
This site contains a description and problems dealing with Euler's method. The site discusses why the Euler method is not used in scientific computations.
TED Talks
Ted: Ted Ed: The Magic of Vedic Math
There is more than one way to reach a correct answer in mathematics. Vedic math, an ancient Indian method, sidesteps traditional computations in a manner that provides a shortcut, while being fun to use and to learn. Gaurav Tekriwal...
Khan Academy
Khan Academy: Reference: Conditions for Inference on a Mean
When we want to carry out inference (build a confidence interval or do a significance test) on a mean, the accuracy of our methods depends on a few conditions. Before doing the actual computations of the interval or test, it's important...