An idea for the students. When they uses the SLSo, they only can add 10 IDs for teachers but when add more the last one only disappears so they had to add the one which disappeared again and also the another last one in the list disappears. They do that as teachers change their IDs. So if a feacture could be added as an option in the website or the account setting to allow the student to delete the unused old IDs from their classes and increase the number of allowed saved classes or IDs to more than 10 "20 may be good" Thanks