This is scary. On this thread: http://talk.collegeconfidential.com/sat-subject-tests-preparation/1616013-general-guide-to-getting-800-on-sat-ii-math-2c.html, the OP says that she got 740 on the barron’s test, 800 on the college board test and 750 on the real SAT 2 test. She then used Dr Chungs and did many tests and got an 800 on the real test. I heard that Dr Chung’s is hard and the “Tips” are not that clear though. I have barron’s and Chung’s.