Dude draws a picture of what he's been daydreaming about. He exaggerates the size of his teacher's massive boobs. On the paper she is giving him a titjob. Leaving his masterpiece in plaint sight on the board, teacher catches him daydreaming. After entering the lecture room, she can't believe what she sees. The boobs on the picture are obviously meant to be hers. The though of him dreaming about titty fucking her makes her furious for a second. Then she realizes that she hasn't had sex for like a month. She puts her massive melons to good use. She makes him worship them first. Once she gets enough, she performs oral sex on him. After some good head, she gives him what he wants. She gives him an amazing titjob. Then she needs his tongue at work. Dude eats her out like there's no tomorrow. Then she lets him fuck her hungry pussy in missionary position right on top of her desk. Once she gets enough, she fucks him on top like a woman possessed. This horny teacher has some magic pussy. Once you've inserted your cock into her pussy, you would never want any other woman's pussy. He's going to be her sex slave for a while.
That's one lucky student who didn't need any instruction.