Contact

Ask us anything.

Questions about the lessons, your account or billing, or a position you think is wrong: send it here and a person will reply by email.

Found a mistake in a lesson?

Tell us the module and lesson number (for example 4.2) and the example or exercise. Every hand-made example was checked with an engine, but we want to hear about anything that looks wrong.

Billing

For receipts, renewals or refunds, choose “Billing” in the form and include the email address you used to buy.

If it’s about a lesson, include its number, like 7.3.

Created by MD79 inc, incorporated in Québec. Learn at your own pace with text and interactive boards. About the platform

Pay today. If the course is not for you, request a full refund within seven days of your initial purchase. How refunds work