It can mean that, but it is usually restricted to a formal use, especially where a famous expert conducts a "class". Actually, they keep using these two words just like this all the time. Hinein one and the same Liedtext they use "at a lesson" and "hinein class" and https://seitensprung10875.newbigblog.com/39935903/eine-unvoreingenommene-sicht-auf-chill