You can add a teacher individually to the community.
1. Log in and select People/Orders.
2. Select Teachers & Others and you will see the current list of teachers.
3. Select Add Teacher(s).
4. Select Add Individual Teachers.
5. Add the teacher's email first and select Add. You will then see the prompts to add the teacher's name. If you do not want an invitation email to be sent to the teacher, uncheck the box. When all the information is correct, select OK.
You can upload a complete teacher roster at one time if you prefer. Here is an article which will help you!