Godot

QuantMech,

Those are good questions. The score improvement guarantee depends on the length of the tutoring course. The most generous guarantees go with the longest courses, of course. Typically, we guarantee a 220-point improvement for a student starting with below an 1800 in a 30-hour course and a 280-point improvement for the same student in a 40-hour course. The guarantee for 1800+ scores tapers off, as you observed, until the 2300+ level, at which we guarantee a 30- or 40-point improvement (I have all the numbers in a file, which I don't have with me right now). For a starting score of 1900 in a 30-hour course, for example, the guarantee would be roughly a 2050+ (again, I am estimating the number) and perhaps a 2100+ in a 40-hour course. The guarantees, as you might expect, represent the lower ends of the expected final score ranges.

We can definitely improve the score for a student starting with a 2100 who has already done a first course with us. However, it would, in general, take more tutoring time to produce a similar increase the second time for 2 reasons: 1) the student is starting with a higher score and 2) the student has already been exposed to all of the strategies and techniques and achieved a good score increase, and it takes more work and time to uncover and address any subtle gaps, weaknesses, and issues he might still have, to break beyond the "plateau," and to fine-tune and perfect his approaches to various question types. In principle, there is really no limit to how high a student starting with a 2100, even in a second course, can score at the end of the course. Typically, I would expect such a student to score at least a 2250 or so in 30 hours or more of tutoring in a second course. Ideally, the course would run for about 7 to 10 weeks.

By the way, the "39 hours" figure applied to the classroom courses we ran.