D20 worked with a private tutor, started in late spring of 10th grade to boost final grade in Algebra 2. She spent an hour a week one-on-one plus an hour or two doing review/practice tests on her own in addition to her regular math homework. She improved over 250 points between her initial PSAT 10 and her final SAT 19 months later in addition to boosting her GPA. She knew what she needed to get for the colleges she was looking at and surpassed her target. I don’t think she would have been able to do that in 1-2 days.