Repl.it and Saving Lecture Assignments

Hi, I have a repl.it and am a little confused how we are supposed to save all our assignments in order with lectures on the App Academy Online site? In the video it makes them look like they are integrated with the coursework. However, when I open the repl.it it is in a separate tab and does not show App Academy.

Do I need to fork each one individually or is there a specific classroom I need to join?