Nowledgeable requires some user information to provide its services. In accordance with the GDPR General Data Protection Regulation), we list those pieces of collected data below, along with an explaination of their purpose and the way they are stored"
Emails are needed for authentification and can be used to send notifications, with the user's explicit consent. Teachers can send notifications to their students (which they will receive by email), but will not be able to see the email adresses of the students.
Username is need to help members recognize each others. Especially it is usefull for teacher to follow the progress of their students. Real names are not required.