I'm looking for web sites that might have exercises for beginners and intermediate users.
So far I found Duolingo and DeutschAkademie, and although they are excellent sites, after a while they get kind of repetitive.
I've been attending a German course for the past 18 months, but we have lectures only once a week (for 4 hours), and I would like to improve my learning process by doing exercises online in my free time.
Do you have any recommendations on such sites?