The DeutschAkademie gives a very good instrument to check and practice your german and … it is for free.
According with your course level you can practice your german lessons on internet, there is a Forum and, if you need, teachers can answer your questions.
Grammar, excercises, listening in an interactive way … the online course is, for sure, a great supplement for the german course.
Here you find the online course:
Enjoy :-)
