If you're in a scenario where a co-teacher needs to be added to your class in Dyknow to help monitor, you as the lead teacher can give them that access by following the steps below:
1) Log in to Dyknow.me
2) On your "My Classes" dashboard, pick the class you want to add your co-teacher to add click on "Edit"
3) On the Edit Class page that comes up, click on "Add teacher," search for the teacher in the search box that comes up, and click on the teacher's name to select them. Then click "Save"
That's it! They can now monitor your class.