You are able to give another teacher access to your class on Go Vocab by doing the following:
Under the 'Students' tab, click on the 'Add Students' button
Then click on the 'Invite Students by Email' button, and in the box below put in the other teacher's email address
That teacher will now have access to your class
The teacher you are inviting must have an already existing Go Vocab account in order to have access to your class.