Resolved -
Thank you for your patience and apologies for the inconvenience. Issues affecting www.khanacademy.org have now been resolved. If you notice any ongoing problems, please submit a ticket at: https://khanacademy.zendesk.com.
Nov 19, 17:14 PST
Investigating -
We are aware of the situation and are actively investigating. We will post updates here once we have more information and an estimate for when the problem will be resolved.
You may experience problems with exercises.
Nov 19, 15:25 PST