We created an Official Note type and set it to email Parents, but no email notifications are being sent out.
The default "Email From" type when you create an Official Note is Review Comments. If the Official Note does not require approval, you need to change "Email From" to Comment or the notification will not send.
Select Settings > Comments
Select Comment Types
Edit the Official Note type
In the "Email From" field, mark the radio button to the right of Comment