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 Songtext they use "at a lesson" and "rein class" and https://seitensprung-deutschland21986.csublogs.com/40737811/eine-geheimwaffe-für-trance-music