By secondary school at the latest, many students will have their own smartphone. Even if not all students have their own device, there is almost always a class chat group. Students use the class chat for exchanges that usually go beyond school-related topics. A lack of netiquette and a lack of time or topic limits in class chat groups often lead to problems such as cyberbullying or excessive demands. Interactions in the chat and any problems in the class chat can also negatively affect the class climate.

To prevent these problems, rules for the class group chat can be defined together with the students at the beginning of the school year. Not only what content belongs in the chat, but also who is responsible for ensuring that the rules are adhered to and for any sanctions. The results can be recorded on the poster "Our rules for the class chat".