You know the answer: you’re a minor, and (more importantly), telling parents works. No, not always, but it’s more effective than not telling the parents.
As a child of demanding parents with high expectations, I eventually figured out a foolproof means of not having my teachers contact my parents: don’t get in trouble. Turn in work, and appropriate work. Turn it in on time. Don’t be disruptive. To the extent possible, fade into the background.