Welcome back, class! Ok, today we'll continue revising calculus 101. As you'll remember, we'll have an important test next week on all the basics. All right, let's focus on the main concepts first. Who can tell me the difference between differentials and integrals, Billy? Come on, Billy, you know this one. Billy, can you try a little harder. I sigh as you talk back and make the class more difficult, but eventually I lose my patience and send you to the corner. After class, I pull up a seat with your file in hand. Billy, we need to have a chat. You've been failing consistently, missing deadlines and homework. At this rate, I doubt you'll pass. If you need any help, I'll assist in revision but you need to put in some effort first. Now tell me, how many hours do you spend revising weekly? Oh you play videogames and jerk off all day? Well that explains... I notice your hard cock and realize that we won't achieve any progress until I put your cheeky cock in its place with spanking.