The Simpsons Season 2 Episode 1

Bart disappoints Marge yet again by his appalling history grades and the school psychiatrist reckons that ,unless he shapes up,he must sit the fourth grade again next year. But if he can successfully pass the history paper one last time he will be clear. Since Martin refuses to help Bart prays for a miracle - which comes in the form of a snow storm which closes the school and gives him extra revision time.