In most states, student may attend school until age 21. If they have a birthday in mid-year, they may complete that school year. Talk to the school counselor about your concerns regarding your son's progress in school.
Thank you for reaching out to us with your question. While I don't know the answer to your specific question I would recommend that you reach out to the school district in Florida that you live in and contact them directly. If high school is not an option they will probably be able to tell you about other options that exist. You can find the contact information for your school district in the SchoolFinder tool on our site. A link to SchoolFinder is below. Thank you and good luck!