After a misprint in textbooks cut short the time some students were given to finish, the College Board, which administers the SAT, announced that two sections of the test won't be scored, and students can ask to retake the test for free.
College Board spokesman Zach Goldberg said he was "unaware of this happening before."
The company said the error affected tests taken on Saturday, June 6. Student test books said test-takers had "25 minutes" to finish the section, while the test supervisors' materials said "20 minutes." The misprint appeared in the reading section, but some doing the math section also lost time.
College Board said scores wouldn't suffer because the test was designed "to provide valid and reliable scores even with an unscored section."
Students concerned about their scores took to online forums to complain, started a Change.org petition, and filed a federal lawsuit in New York, which seeks class-action status.