Duolingo as Assignments Sucks

In my IB Seminar class, since it's closer to the end on the school year we are assigned to 2.5 hours a week. As a senior in high school AND it's finals week, i never have time to do so. In order to get my IB diploma, I have to have 50 hours of duolingo between 11th and 12th grade. I only have about 30 something. Is there a way to leave duolingo running so I can rack up some hours before the end of next week??