I believe that one of the most important educational objectives in the mathematics classroom it that of helping young people develop an attitude of creativity, resourcefulness, self-confidence, and perseverance in the face of challenging problems.
To that end, Collaborative Mathematics is a website I operated between 2012 and 2015.
The main goal of Collaborative Mathematics was to use video as a means of connecting a worldwide community of mathematical problem solvers. The site offers an assortment of puzzle videos and a library of user-submitted solutions.
Click here to visit CollaborativeMathematics