U.S. education system

What letter a failing grade in U.S. schools?

How is college credit usually earned in the U.S.?

Which of these is typically a required subject in U.S. high schools?

What is the level before the university in the U.S. education system?

What is an elective subject?

What age do children in the USA usually start school?

What's the cultural significance of the graduation ceremony in the U.S.?

What is the purpose of the Pledge of Allegience in U.S. schools?

How many years does High School typically last in the USA?

What exam is commonly used for college admissions in the USA?