PORT ST. LUCIE, Fla. — Should students get half credit for an assignment they didn’t even turn in? A former St. Lucie County teacher doesn’t think so. That’s why she wrote a goodbye message to her eighth graders on a white board saying, "Bye Kids, Mrs. Tirado loves you and wishes you the best in life! I have been fired for refusing to give you a 50% for not handing anything in. 💓 Mrs. Tirado" Diane Tirado has been a teacher for years, but she started at West Gate K-8 School in Port St. Lucie in August as an eighth...