May I suggest that Duolingo's hints that appear when you hover the cursor over words should always show the correct definite article with each noun being viewed, not simply the base word. For instance when I hover over "spot", I should not see "Stelle". I should see "Die Stelle" or alternatively the noun and grammatical gender, for instance "Stelle (Weiblich)". The hints are misleading when "The" displays a drop down list of "Der Die Das" but there is no indication of which gender goes with which German noun that is listed under "spot". The current system does not teach me, it seems to expect that I already know.