Here with nick waffle you should be safe unless you tell name of your school :)
after 2 months of resting from 4 years of studying in college, i got a job. now i am a teacher of computer science. in the school where i studied. everyone here were inviting me for about half a year, including some highschoolers i knew.
the first week i questioned my experience (still do, im not a teacher, i just write english words in nvim and they get colored differently). but the kids are kind to me. i talk about different topics with them. yesterday a lot of girls tried to make me watch their favorite anime series. also i got a... love letter? there are a lot of hearts. perhaps they are trying to brown-nose, knowing that I am not such a mean or experienced person. but i will not give good grades just because of pretty eyes.
but sometimes they scare me. for example, they trying to find my half secret telegram blog. they even found my old photos with a tomato plant in a pot (behind the window where you can see the street im living in). some of them gave money to some hacker so he can show them my public chats.
im so scared that all my passwords are living in keepass database now. just in case.
Welcome to real life.
Well, nothing online will remain secret for long. And as a teacher, you have many curious youngsters "against" you. And they have a lot of time on their hands, so much it make me jealous! And they even don't know this! :-)
Keep your really secret stuff offline. Feed the curious with harmless, well prepared thingies, so they find something. Better said than done, I know!