High School is a secondary level of education that children attend between the age of 14 and 18. They usually attend high school between grades 9and 12.
High School in a Sentence
I attended high school from when I was 13 until I was 17.
I went to a high school in Toronto.
High Schools all over the country need more laptops.
Is High school one word or two?
“High school” should always be two words. You can read more about how to use the words high school here.