stealth mining?

there's an asshole teacher at my school who constantly bullies me, so i want to sneak into her laptop and install a hidden monero/bitcoin/ethereum miner that mines coins in a stealthy way and sends them to my wallet, preferably through a pool. thread usage must also be variable (i don't want it at 100% because then she will clearly notice, i'm thinking 30-40%). any ideas on how i can achieve this?

You would get into serious trouble if you get caught. You have to be clear about that. However, to stay ontopic, maybe send a file to your teacher which contains the silent miner?

i can easily get access to her computer, that is not the issue. i need to know how exactly i would execute it