<p>Is there a difference between high school and secondary school? I have to fill in an app. If it says secondary school does it mean 5th grade to 8th or 9th grade to 12th? Thank you in advance!</p>
<p>In the US, secondary school is high school, and normally is 9-12, but sometimes is 10-12. In other countries the number of years of secondary education is different.</p>