Another comment states that the movie was made at "San Antonio High School."
This is incorrect; the setting was Thomas Jefferson High School. I know; I attended Jefferson (tho I was only 2 years old at the time that the movie was made). One of the big deals of the movie was the pep squad called the Lassos. At the time that was the only pep squad composed of girls who could actually twirl ropes when they marched on football fields during the half-time or in parades. That was still true when I attended Jeff from 1953-56 -- and twirled a rope as a Lasso.
As far as I know, there has never been a San Antonio High School; there was a San Antonio Vocational Tech H.S. -- my mother went there.