High School Graduation in the Lee County Public School System requires completion of all requirements set by the State Board of Education. The Lee County Board of Education recommends completion of twenty-eight (28) units of high school credit over four years in order to earn a diploma. A four-year high school experience provides students with an opportunity to expand their academic pursuits and interests. Students who want to be on an accelerated graduation plan should commit to this plan prior to entering 9th grade. Â