Practice the Superhero technique with the following words. Don't worry about the German meaning. Later, when you learn the words you will remember their article. Also this exercise is not about vocabulary. It is about learning a very important and powerful learning technique. Make short stories with 10 items each. Then take a longer break as you don't want to practice your short-term memory but want to remember the articles for good. Come back later to answer.
SUPERHERO: beard - mouth - pencil - hat - head - rain - umbrella - fish - floor - buttocks
QUEEN: jeans - breast - hand - post-office - wall - watch - time - sausage - sight - night
BABY: military - eye - bathroom - knee - blood - glass - sink - plaster - shelf - bed
Note that most feminine words (=die) carry a signal that gives their article away. So you will rather find that you have to deal with Superhero- and Baby-words a lot.
Test yourself twice. Once immediately after learning and then let some time pass. Come back in an hour or even later and you'll be astonished how many of the genders you'll still remember.
Also try to explain in your own words what you have learned in this lesson.