These "clandestine courses" certainly exist in rich nations, and are secretly held during lunch and in private homes. For example, to avoid bosses knowing. Ski

These "clandestine courses" certainly exist in rich nations, and are secretly held during lunch and in private homes. For example, to avoid bosses knowing. Skilled human tutors, free from school/university bureaucracy, can get into your head and figure out effective ways to inspire learning. Leads to faster and surer learning, for those lucky enough to have it.