Denna mening måste handla om den svenska kursen.
How about "The course is considered very rewarding..." ? That sounds more like what an English speaker would say.
... or, "very profitable" would be a common way of expressing this sentiment in English. (was not accepted)
Profitable meaning that it brings financial benefits. I think that rewarding is broader since it can be psychologically rewarding , on the other hand I see profitable more connected to financial return
Why"is" and not "was"
upplevs is present tense. Kursen upplevs... The course is perceived...
Kursen upplevdes... would be The course was perceived...
Weird, I got a listening exercise and all the words were already filled in