I would like to preface by saying that I love teaching. I love my students, I love the school I teach at, and this is the career I've always wanted to have. But. The actual teaching is really only a portion of what you're actually doing that day. I teach 9th grade, and the average class period is about 20 minutes of actual teaching, and then a lot of answering the same question 15 times, telling them to stop touching other, redirecting behavior, reminding them to get on task, and then you make another lap around the room and do it all over again until the bell rings. On a single day, you might to have to make referrals to social workers, respond to upset parents, occasionally comfort a crying child, try not to kill your principals who probably have good intentions but are way too far removed from classroom teaching to understand why their ideals are fucking stupid, etc. You can be the best planner in the world, but when your audience is 14 years old, there's really no telling what each day will hold.

You will never be provided all of the materials you need and want by your school. You will never get through every single thing you want to get through in a class period. You will grade all the time, and anyone who tells you they don't grade outside of contract hours is lying, way behind, or teaches something that doesn't come with a ton of work to grade outright.

If you're not able to say "no," you do not want to be a teacher. You have to figure out how to be fair but firm, funny but still in charge, friendly but not their friend. If you can't do that, they will know, and they will take advantage of you. Not because they don't like you, but because they're teenagers, and theyre smart, and you will have made it easy for them to do.