30 minute lesson = 15-20 min. per day, 5 days/week 45 minute lesson = 30 min. per day, 5 days/week 60 minute lesson = 45-60 min. per day, 6 days/week
45 minute lesson = 30 min. per day, 5 days/week
60 minute lesson = 45-60 min. per day, 6 days/week