Google Classroom schedule ahead assignment for multiple classes
Ok, ok, As of right now there still is no built in 100% perfect way to just do this. However I did come across this workaround which might be of some value. I think it would be a little faster than reusing a post from the first class.
I did some research at the request of a teacher and tried to find an extension that would accomplish this but had no luck with that. If anyone ever finds one please let us know.