Can't add AP US history

Hi Qinghan Jiang,

The AP US History course is only shown in the My Courses menu for users located in the U.S.. If you're located outside the U.S. or using a VPN, then this course might not be shown to you. One workaround for this is to use a U.S.-based VPN or manually override your browser's location settings.

Regardless of location, you should still be able to access the course via the direct link: https://www.khanacademy.org/humanities/ap-us-history?lang=en

If you're currently located in the U.S. and are unable to see the course, please submit a support ticket so we can take a closer look.

I hope this helps!