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Every premium lecture published for the class on your profile, for one year from the day you pay — including lectures added during that year. Each lecture says which chapters it covers. The notes stay free for everyone.

One year from the day you pay. It does not renew by itself: you can renew in the last 30 days of your year, and the new year starts when the current one ends.

Yes. Lectures play in the browser on a phone, tablet or computer — sign in with the same account and you pick up where you stopped on any of them.

Sign in, make sure your class is set on your profile, then open the Free Library and press Download on any note or paper. Everything you download is kept in My Downloads.

Refunds follow the refund and cancellation section of our Terms. Write to us from the contact page with your order reference — it is on your receipt and under Orders.

Reload the page first — a premium lecture's player link lasts two hours. Premium lectures need you signed in, with Premium for the class on your profile. If it still will not play, write to us with the lecture's name and we will look at it.