You need to be the class admin to invite other colleagues to the class.
1. Log into your SchoolFox account via your web browser: my.schoolfox.app
2. Select your class and click on „Settings“.
3. In the section „Teachers“ you can add a colleague. For this you need his/her email address. He/she will be connected automatically. If he/she doesn't have a FoxEducation account yet, an invitation will be sent via email.