You can add a free sandwich to your school supply list.

Potbelly is offering a sandwich buy one get one (BOGO) deal to make the transition back to school that much easier.

The deal kicks off on Tuesday, Aug. 26, at Potbelly locations nationwide to celebrate the return to the classroom.

What is the BOGO deal?

Potbelly lovers will get a free Original sandwich when they buy any Original or BIG sandwich on the menu, the restaurant said. Need a break? Play the USA TODAY Daily Crossword Puzzle.

Potbelly's secret underground menu items, which are available on the app , also are included in the promotion.

Fans can get the deal using the code "BOGO" on the Potbelly app or online at potbelly.com. More food news: In-N-Out opens first location in Washington. Where else are they opening?

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