Open the application menu and select "Account settings".
Click on the name of the family in which you want to add a new member (if you have added accounts in different institutions).
Click on "Add family member".
If the "Add family member" button is not visible, it means that the school has restricted the access of parents to manage family members, and in this case you must make a request to the institution's staff to add a member to the family.
You can NOT add additional student accounts, only the staff of the institution can add student accounts.
Now you will have to fill in all the necessary data and click on "Save".
An email with an invitation to activate the account will be sent to the address filled at this step.
After you have added the user, you will see him on the page with the other family members.