How to move 600 students up to the next section of code.org

I am hoping that someone will be able to explain in a few simple steps how to move my students from one grade level to the next. Over this current year, I have taught grades 3 through 7. I have basically used the secret picture cards, the 2 secret words, as well as having my students create a basic user name and password. Is there a simple way to move all of my students to the next course within code.org?

Go to the course you want to assign and then select the section you want to assign to it.