Hi everyone!

I have written a story about a girl just beginning in high school (the first class in high school, I mean).
This girl in my story is 12 years old, which is a pretty common age to go to high school in my country (The Netherlands), where we go to high school at age 11 or 12.

Now, I've translated my story to English and my editor commented that she is way too young to go to high school in other countries. She told me that kids usually go to high school at age 15 or 16 and graduate at age 18. Is that true? I can't seem to find useful info online and I'm really wondering what it's like internationally. So that my story at least makes sense in other countries than mine, lol.

Thanks for reading this!