Q. I am looking for articles about a "school" become a "college"

Here are a couple of legal definitions of college: http://thelawdictionary.org/college/  http://definitions.uslegal.com/c/college/.  I suppose any institutions that don't meet these critera are merely schools.  Here's some information on accreditation as well: http://www2.ed.gov/admins/finaid/accred/index.html.  Did you have a particular institution in mind?