awesome LINK to interactively practice Swedish GRAMMAR
thought I'd share this link to interactive exercises (similar to those on duolingo, but more grammar based) on Swedish grammar. It's the site to a Swedish textbook, "Rivstart". They're really useful - and language independent , no translating involved. On the same site you can find a vocab list, list of irregular verbs, listening comprehensions and sample tests. Check it out here:
You do have to create an account, but they will not spam you in any way.