Step 1 : Introduction to the question "What grade is Bart Simpson in?"
...Bart Simpson, the mischievous and rebellious character from The Simpsons, is a fourth grader at Springfield Elementary School. His time in fourth grade has become a defining feature of his character, encapsulating his youthful spirit and troublemaking tendencies. Despite being on the air for over three decades, Bart remains perpetually in fourth grade, a creative choice that preserves his role as a quintessential 10-year-old boy. He is frequently at odds with authority figures like his teacher, Mrs. Krabappel, and Principal Skinner.