I have created several flashcard sets using Quizlet. Anki is a similar tool. I don’t know which one is better or if they are of equal value. Quizlet is just the one I bought a subscription to and enjoy working with.

Here is a link to all the German flashcard sets I have created so far. They are in no specific order. I will sort things out in posts to come when I match up sets with specific topics. (Class members will already have sorted sets. If you’re not a member in one of my classes, the links might only work if you have a subscription to Quizlet.)

In addition, I strongly recommend going to the DW website. Beginners go to the Deutschtrainer, advanced beginners or intermediates take a look at the Deutschlandlabor, and upper intermediate or advanced learners can choose something from the advanced section. There is an extra section for C1 and C2. However, I recommend to all to just look around and explore to find whatever may interest you.