I live in Sweden and it's less common for students to study in Ivy-league schools abroad.
And yes, it's a very special way of learning - puts a lot of responsibility on the student. But on the first day of the weeks in the group meetings your mentor checks up that you managed to hit your goals last week etc - and if they notice that you keep up failing your targets they will take this up with the parents and possibly make up a study plan for you and see to it that your in the workshops of those subjects between the agreed times.
And yes, it's a very special way of learning - puts a lot of responsibility on the student. But on the first day of the weeks in the group meetings your mentor checks up that you managed to hit your goals last week etc - and if they notice that you keep up failing your targets they will take this up with the parents and possibly make up a study plan for you and see to it that your in the workshops of those subjects between the agreed times.