Internet is more than valuable source of learning and practicing opportunities. The same applies to German Grammar too. Check out the below possibilities to learn and practice German Grammar online.
Grammar – THEORY:
Detailed explanations in English to various Grammar-topics can be found here: German Language Workshop. We all know that Deutsche Welle is an extraordinary source of Information for learners and teachers. The only problem is that the descriptions are in German.
Grammar – PRACTICE:
learngrammatik is one interesting site where you can practice your grammar. This site is in German, but it is pretty intuitive so it shouldn’t be a problem for you to orient yourself.