We're only 5 weeks in and people have pretty much gotten to the same level of basic progress, which is far further than Duolingo in 18 months, regardless of homework, no tests - and eventually everyone will have to take a B1 exam anyway. B1 is required by the state, so I expected most people would have a slightly higher level of motivation, but people are of a much wider range of skill than I've previously experienced in a class and some of far less motivation.