Students get in last-ditch prep for SAT

For many students, it'll be nearly four hours that could shape four years of their futures. Tomorrow is SAT day for thousands of high schoolers, and the test before them will be unlike any before.

The College Board has revamped this year's edition, to include an essay and more emphasis on grammar and advanced math, while also taking out some vocabulary words.

One junior in New Jersey says he and fellow students are this year's "guinea pigs," but he says he likes the new writing section. Test administrators say the redesigned test isn't harder than the old one -- just different. But that hasn't kept a record number of kids from using test preparation companies like Princeton Review and Kaplan for help. A Princeton Review official says the key bit of advice is for kids to simply "relax."