Mathematics

Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. This is a direct link to the subject of Math.

Listing of open educational resources for mathematics from Humboldt State University.

Webmath is a math-help web site that generates answers to specific math questions and problems, as entered by a user, at any particular moment. The math answers are generated and displayed real-time, at the moment a web user types in their math problem and clicks "solve." In addition to the answers, Webmath also shows the student how to arrive at the answer.

Wolfram Alpha is an engine for computing answers and providing knowledge.It works by using its vast store of expert-level knowledge and algorithms to automatically answer questions, do analysis and generate reports.