Is there a way to get vocab flash cards showing nouns with their definite article. It seems like a "must" to lean words with their gender.
That would definitely be great. In the meantime, if you just want flashcards, there are Duolingo-specific flashcard sets on Memrise and Quizlet. Both sites are worth a look, and I know a lot of people really like Memrise as part of their whole language-learning suite.