Click the **User Settings** icon in top-right menu.

Select **Collaborate - Permissions** in menu bar.

Click the **Add** (+) button to add a new permission.

In the **Permission Title** field, give the permission a label. 

In the **Types** drop down menu, select the type of permission you would like to set up.

Enter the email address of the teacher(s) that you would like to create a permission for.

Select the classes that you wish to link your lessons to.

Select the editing capabilities that you wish to allow for your collaborators, by selecting **View Only** or **View/Edit** for each lesson section.

Click the **Save** (checkmark) icon in top-right menu to save your changes.

Link: Source Teacher