Syracuse University and more than 70 colleges and universities may want to send retailer Old Navy back to the classroom.

A new line of licensed collegiate clothing released at 1,000 Old Navy stores this week gets an "F" in grammar.

A T-shirt reads “Lets Go ‘Cuse” or “Lets Go Stanford” — missing the grammatically correct apostrophe.

They should read “Let’s Go...” as in Let Us Go.

How the misprint slipped by grammarians is still a mystery. Calls to Old Navy and its parent company, Gap, weren’t immediately returned Friday. Kevin Quinn, senior vice president for public affairs at SU, was looking into whether SU had approved the final design.

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Quinn also deferred to The Collegiate Licensing Co., the nation’s leading collegiate trademark licensing and marketing company, which had a hand in the deal between Old Navy and the schools.

Tricia Hornsby, spokeswoman for CLC, said she was checking into the lost apostrophe.

The T-shirts sell for $19.94 and are online and in local Old Navy stores — for now.