ADA Project – Maths Questions – Math Questions – Mathematics Questions. (n.d.). Retrieved April 08, 2018

The ADA Project is an open multimedia mathematics resource that covers everything from basic arithmetic to calculus. On the ADA Project’s homepage, teachers or students can select a category and then choose a topic. Within each topic, they will find a set of sample problems. Each sample problem is accompanied by a link to reveal the solution, a video that explains the solution, and a link to a discussion forum.