<p>Ehy guys! Just a stupid question..
How old are you when you start to go to high school?</p>
<p>Can you explain me the high school system? how many years? junior, senior...???</p>
<p>People usually start at 14 years old and end at 18. It is 9th to 12th grade known as freshmen, sophomores, juniors, seniors. It is basically the same as middle school.</p>