Honors Test Prep is probably the best in Virginia. Price is reasonable. Check out the testimonials. DD went from 2000 to 2350: 800 reading, 800 writing, and 750 math along with a comparable PSAT score which qualified her for NMSF.

My DD -- accepted at U Chicago -- graduated TJHSST with six AP plus two post-AP classes (dual-enrolled TJ/GMU math classes).