[trevelyan]

We actually provide this for mandarin as part of my business (http://popupchinese.com). And if you're looking for a data point, we charge $25 for three 20 minute sessions a week. The workload ends up being about as intense as taking a regular night course, except that it is one-on-one with a teacher.

Textbooks and traditional classrooms are way back on the curve. They prioritize the organizational problems of schools instead of the learning needs of students.