Only the "Introduction" and "Intermediate" courses are visible on me and i find out that this 2 courses together have less information than the classic one. Not to mention that it doesn't have any exercises at all.
There are other course related to js on sololearn. Additionally, you can try other sources of information to learn advanced/or what's not presented on here, such as: js documentation, YouTube, w3schools. Also, you can learn html & css that are linked well with js if you want to focus on web development
just let us know what is "classic" you mean?