Professor Lassonde
Khan Academy
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You only have to know one thing: YOU CAN LEARN ANYTHING! For free. For everyone. Forever. Take control of your learning by working on the skills you choose at your own pace. Sharpen your skills with over 100,000 interactive exercises. Math, science, computer programming, history, art, economics, and more. No ads, no subscriptions. We are a not‑for‑profit because we believe in a free, world-class education for anyone, anywhere. Start learning now.

If you have technical difficulties, visit Khan Academy's support page.
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Our goal is to help every student succeed. We're working with educators and institutions to improve results for students everywhere.

For Technical Support with MyMathLab: visit the support page.

You can call MyMathLab technical support at (844) 292-7015.

Or, start a live chat with support available 24/7.
Wolfram Alpha
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Wolfram|Alpha introduces a fundamentally new way to get knowledge and answers — not by searching the web, but by doing dynamic computations based on a vast collection of built-in data, algorithms, and methods. Wolfram|Alpha's long-term goal is to make all systematic knowledge immediately computable and accessible to everyone.

For technical support, contact
TED Ed logo
TED-Ed's commitment to creating lessons worth sharing is an extension of TED's mission of spreading great ideas. Within TED-Ed's growing library of lessons, you will find carefully curated educational videos, many of which represent collaborations between talented educators and animators nominated through the TED-Ed platform. This platform also allows users to take any useful educational video, not just TED's, and easily create a customized lesson around the video. Users can then distribute TED-Ed lessons, publicly or privately, and track their impact on the world, a class, or an individual student.

For technical support, visit the TED Ed support page or the TED Ed feedback page.