Students from a Chelsea high school have to retake their English Regents exams today after their original tests fell off the back of a truck on their way to be graded, the teachers union said last night.

The United Federation of Teachers said about 75 11th-grade students from Chelsea Career and Technical Education HS have to retake the test after education company McGraw Hill lost the booklets.

“We were told that the test booklets were on a truck, somehow the boxes of tests fell out,” said English teacher Jan Scott. “Some they recovered, but not ours.”

A rep for the city Department of Education said in a statement, “When we learned of the missing exams earlier this summer, we worked closely with McGraw Hill to try and locate them, but ultimately did not find them so the students are retaking the tests.”

“All my students know is that no one ever found their test,” Scott said.