Masculinity / Femininity Practice
I think it would be cool if there were a way to practice learning a word's gender through some sort of practice targeted towards that area. That could include having a list of words and selecting the gender.
Good luck with that. There are no clear rules allowing to determine that. For french, it is never a problem because when we learn words as children, we always keep the article and the word together. It is a common mistake made by foreigners, but don't worry, once you've been corrected a few times, you'll know them :)