Others' scores on these boards have been helpful in comparing my progress so here are my practice scores in chronological order and my GMAT score (written on July 11th, 2009)
Practice---
Princeton Review Practice Test 1: 580 Q29 V41
Princeton Review Practice Test 2: 640 Q37 V41
Princeton Review Practice Test 3: 560 Q31 V31
Princeton Review Practice Test 4: 550 Q33 V33
Princeton Review Practice Test 5: 540 Q31 V33
GMAC Practice Test 1: 710 Q39 V(n/a)
GMAC Practice Test 2: 640 Q40 V38
GMAT---
620 Q32 V42
I'm writing again at the end of September. If anyone out there can recommend a good book of math questions and/or math theory for the GMAT, please let me know.
Practice---
Princeton Review Practice Test 1: 580 Q29 V41
Princeton Review Practice Test 2: 640 Q37 V41
Princeton Review Practice Test 3: 560 Q31 V31
Princeton Review Practice Test 4: 550 Q33 V33
Princeton Review Practice Test 5: 540 Q31 V33
GMAC Practice Test 1: 710 Q39 V(n/a)
GMAC Practice Test 2: 640 Q40 V38
GMAT---
620 Q32 V42
I'm writing again at the end of September. If anyone out there can recommend a good book of math questions and/or math theory for the GMAT, please let me know.

















