Translation of Nützlichkeit

In the that time of the year, when I used to go to school, I had to get up very early and leave the house at around seven o'clock in the morning. At this time it was still night, dark and cold outside.
I went back to the busterminal and dressed for the ride. That means I put on long pants and my hiking boots. Friends have warned me about freezing conditions during bus rides because of airconditioning.
We found an password solution to enable teachers and their students to work with your lessons. These teachers would need to enter the password of the lessons and could then continue to use them.