Sullivan, 11, skipped school on Friday in order to go with his dad, Ryan Sullivan, to see the president speak at the Honeywell factory near Minneapolis where his father works.
While the tween was there, he got a chance to shake hands with Obama, who volunteered to write a note to Sullivan's teacher explaining the boy's absence from school.
"Mr. Ackerman –" reads the note, which is written on presidential stationery. "Please excuse Tyler ... he was with me!"
The president spoke about creating jobs while at Honeywell, which has made it a priority to hire veterans, the Associated Press reports.