WASHINGTON - The final run for the current version of the SAT college entrance exam comes this weekend, when hundreds of thousands of students nationwide will sit, squirm or stress through the nearly four-hour reading, writing and math test.

A revamped version of the SAT debuts in March.

The College Board says the new SAT will focus more on what students are learning in the classroom and analysis by students. There also is no longer a penalty for guessing on the redesigned exam, and the essay will be optional.

The board says there's no reason for students to be anxious about the new look of the SAT. But some college counselors and test preparation companies say some students are focusing on Saturday's exam because it's more familiar.