Parent's sarcastic letter to Jack, mocking his Common Core math method for subtracting 427 - 316, resulting in the incorrect answer of 111, highlighting confusion over modern teaching techniques.
A humorous handwritten letter from a parent to a child named Jack, criticizing his math homework method for solving 427 - 316, using a number line and an incorrect answer of 111, with the parent jokingly claiming a Bachelor of Science in Electronics Engineering but still unable to understand the Common Core approach.