Ralph D. Butler Elementary School,Patrick Clark Drive,Avon, MA 02322 (508) 587-7009 Grades PreK-6: 8:25 am - 2:40 pmAM Preschool: 8:20 am - 10:50 am PM Preschool: 11:40 am - 2:10 pm Early Dismissal:11:40 am (No PM Preschool)