As a security measure, the default Zoom URLs at zoom.us are blocked. All Great Hearts classes and meetings are available at a https://greathearts.zoom.us.
If you receive a message like
zoom.us is blocked
The person who set up this computer has chosen to block this site.
Try contacting the system admin.
ERR_BLOCKED_BY_ADMINISTRATOR
Please verify you are accessing zoom by browsing to https://greathearts.zoom.us and entering the meeting ID or by clicking a link provided by us.