Well, unless we fail a grade 
Typical American schooling is Elementary School which is Kindergarten then grades 1-5, Middle School which is grades 6-8, and High School which is grades 9-12. There are variants which move grades around between schools (K-6, 7-9, 10-12 is a common pattern, too).
Yep, and typical Canadian schooling is Elementary School (grades 1 -
and High School (grades 9 - 12). We don't normally have middle schools.
