A South Carolina English teacher has gone viral for correcting a letter from the president.
Yvonne Mason has been teaching for 17 years, and says she's caught plenty of "silly mistakes."
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She said she was very surprised to see so many silly mistakes in a letter received from the president.
So, Mason decided to correct the letter and send it back to the White House.
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The letter was in response to a letter she wrote the president after the deadly shooting at Parkland High School.