In all of my experiences formally studying a language, the one constant is that it feels like the class is designed to meet a checklist rather than to create an environment for learning. To paraphrase my orchestration professor, you can water all you want, but the plant will grow when it grows. In other words, you can do all the homework and review and drills you want, but the concepts will click and the words transfer to long-term memory on a timeline that is not always within the student’s control.