He is assigned by Dumbledore as a potions teacher in 1981 even though he wants to teach the Dark Arts. He becomes head of Slytherin house. In June 1985 Slytherin wins the quidditch cup. In 1991 on September 1st Harry Potter became a student of proffesor snape’s. On the 8th November Snape gets bitten by Fluffy. On the 9th November Snape saves Harry’s life in a quidditch match. On the 22nd of February in 1992 Snape referees the Hufflepuff versus Gryffindor quidditch match so that Quirrell doesn’t interfere. He looks after Harry because he loved Lily. He doesn’t like Harry because he reminds him of James. On the 17th December at 8PM Snape duels Lockhart for the duelling club. On the 5th November, 1993 Snape substitutes for Remus Lupin as Defence against The Arts Teacher and teaches Harry and Hermione and Ron about werewolves. On the 6th of June 1994 Snape follows Lupin to the shrieking shack where Harry Potter immobilises him to save Sirius. On the 25th December Snape blasts apart Rose bushes and hands out detentions even though it’s Christmas.