Screen width of at least 320px is required. Screen width can be adjusted by widening your browser window or adjusting your mobile device settings. If you are on a mobile device, you can also try orienting to landscape.

Refund Policy

Individual Subscriptions:

You can cancel your subscription anytime, and automatic renewal will be disabled.  You’ll continue to have full access to the material until the end of your current billing period. You will not be charged again unless you resubscribe.

Educational (Group) Subscriptions and Gift Subscriptions:

There is no refund policy for group subscriptions and gift subscriptions. If you are not sure if this program would work for you, we suggest taking one month subscription to evaluate the program before signing up your students.

Apps require subscription to log in