This was taken from a sexting conversation so no, it's not gonna be amazing ;)
Teacher: *opens door* Hello, come on in. So, how are you feeling today?
You: I'm okay thank you *sits at desk and gets stuff out*
Teacher: So you know why I called you here today don't you? You got an F in your last paper...
You: So are you gonna tell me off or what? I'm sorry, what do you want me to say?
Teacher: I don't want to tell you off. You're a smart girl, so I'm going to give you another chance...
You: So why am I here sir?
Teacher: Well of course I'm going to give you another chance, but you have to do something in return.
You: What do you mean sir? ~ Of course I'll revise more
Teacher: *Grabs your hand and puts it on my pants* I think you know what I want.
You: What? Are you crazy?! What if someone catches us?
Teacher: Don't worry, everyone has left the school and I've locked the door, no one will catch us. *Unzips pants*
You: You're a teacher, so are you gonna teach me what to do?
Teacher: I'll teach you how to be a good girl from now on. Now get out of that seat and get on your knees!
You: Yes sir *cautiously touches you*
Teacher: Come on, to get an A you're going to have to do better than that!
You: *grabs your erection* fine, I'll show you an A grade blow job
Teacher: Oh cutie, I didn't know you were so good, suck that dick. *Pushes her head deeper into my dick*
You: *looks up at you for approval* I'm just doing what you tell me to, I'm being obedient
Teacher: Keep sucking my dick while I grade you on your blow job. *The door starts to slowly open*
You: Shit someone's here- *pulls away from you and wipes mouth*
Teacher: *takes your hand and runs into the closet* Shit, its Mr Phelps. Well, we better make the most of it * I slowly run my finger up your leg and start to finger you whilst trying to cover your moans* I also start to undress you
You: *trying not to make any noise and you're trying to keep me quiet but as you kiss my neck I take a breath and let out a moan*
*Luckily Mr Phelps doesn't hear the moan and leaves the room.*
Teacher: Hey, that was a grade B blowjob, however you could get to a grade A by letting me fuck that tiny pussy of yours….
You: a B is still good but I need higher... Please sir, I would like that A, help me to achieve it
Teacher: Okay, bend over and let me see that ass of yours
You: *bends over obediently*
Teacher: *grabs ass and sticks large dick into pussy* *starts to thrust in and out going faster with each thrust* Take that girl, oh god yeah!
You: *moans and catches breath* Sir does this make me a teacher's pet?
Teacher: Of course it does, now be a good girl and turn around so I can cum in your face!
You: *turns around and closes eyes* yes sir, does this mean I get an A?
Teacher: Of course it does! Masturbating in front of a student feels so wrong but so good at the same time *eventually cums all over your face*