The quality varies. My art appreciation course required a full 18x24" watercolor pad with 12 sheets, which is approximately $22. The projects that were made in the class did not use all 12 pages, only 4, despite what our professor insisted. We never even used watercolor paints. Instead, our professor opted for cheap tempura, which made the class feel more like an elementary level arts and crafts class rather than a college level art appreciation course. Our curriculum was rushed and did not cover more than half the textbook.
However, my business law professor had a very high quality class that I'm very satisfied with. We covered a high amount of information in the time that we had and every minute in class was worth it, from explaining certain laws, answering questions and providing help with the online portion of the work. It's hit or miss, depending on the professor.