Spreekwoorden en gezegden
From my 12 years o fliving in Holland, I can say that it is impossible to be truly fluent in Dutch without knowing all its numerous proverbs and fixed expressions. Yet the course seems to have very little on that. Is there an initiative to create a separate experience (tree) in this area?
Maybe this memrise course about conversational connectors may help you practice: http://www.memrise.com/course/352202/conversational-connectors-fillers-dutch/