site map

Not signed in.   |   student sign-in   |   teacher sign-in

Join the announcement list

It's easy to find out when new drills and new features are added to
Just enter your email address below, and we'll send you an email to let you know.

IMPORTANT: if your email account has automatic spam filters, you may need to set your software or your account to allow email from

Your email address will be used only for these notifications; see the privacy policy for more details.


Will you keep my email address safe?

Your address will not be accessible to any other company or website (you will not get any "spam" by adding yourself to this list!), and you can remove your email from the list at any time.

How much email will I get from this list?

Currently, emails are sent less than once a month.

Is it easy to get off the list?

Very easy. Every message you get will have a link at the bottom for removing yourself from the list — just click it.

I think I already signed up — how can I check?

It's safe to just sign up again. If your email address is already on the list, it won't be added a second time.