Middle Tennessee State University accepts a PF HS diploma. You must check with the colleges that do accept the PF HS diploma for additional coursework required. The High School program with Penn Foster did not meet MTSU's undergraduate admissions, so I had Penn Foster add additional units of certain courses and electives, some I will pay in addition to my tuition. My advice---Contact the Admissions department at the college you want to attend. Many will accept a Penn Foster diploma. Just because they may not be listed at the moment, does not mean they will not consider you or allow you to apply. You may need to do more courses with Penn Foster, but in the end, it is well worth it. I am at 53% done. I started the program in September 2018. I have absolutely no complaints with Penn Foster.