CommonLit does not currently support co-teacher (coteacher) functionality on the site, though we plan to in the future.
Teachers who want to share admin access to classes, assignments, grading, and reports will need to share login information. Only 1 teacher can own a class or import it from Google Classroom or Clever.
A co-teacher can also sign up as a student in the class using the class code; be sure to leave the email field blank so you can still sign up for an educator account.
If you are a foundation that is interested in funding this feature, please contact firstname.lastname@example.org.