The Wonder Years (1988)

S3E20 Goodbye

Kevin believes achieving a B in math is the pinnacle of his abilities. However, his teacher, Mr. Collins, challenges him to aim for an A and offers to provide private tutoring. Just before the exams, Mr. Collins unexpectedly cancels the lessons, leaving Kevin feeling abandoned. In a fit of frustration, he fills his exam paper with random, nonsensical responses, expressing his disappointment and sense of betrayal.