Why are lessons not being posted to Google Classroom?
Edited
Tynker needs to be granted permission to write to Google Classroom, and occasionally those permissions change. You can resync Google Classroom by going to the students page of the class and clicking the Sync With Google Classroom button. Make sure popups are enabled, and grant Tynker Google Classroom permissions in the popup that comes up when you click the Sync With Google Classroom button.
