When creating your classes, first choose the "Class", the "Level" and "Teacher(s) access".
With "Teacher(s) access", you can choose more than one teacher.
All the teachers that you have chosen will be able to see this class in their teacher's accounts. If you do not also assign the class to yourself, the class will not be visible in your account.
In case you have already created a class and want to subsequently assign it to a colleague:
1- Go to "Classes" on the left-hand side menu
2- Choose a class
3- Click on "Edit teachers" and add your colleague(s)
It is only possible to assign a class to a colleague if they have already created a user account.
If you want to invite your colleagues to create their own account, click on "Colleagues" and "Invite colleagues" or you ask them to follow this link.