Just nine classroom sessions for GMAT help at Manhattan Prep, a leading test prep firm, would set you back a minimum of $1,699. An online version of the same course is priced at $1,399, while the ...

Google the words “test prep”and “teachers,” and you might get something close to the same number of results as I did: 428 million in 0.65 seconds. That’s a heck of a lot of focus on test ...