Once you have your child evaluated,make a plan with your school teacher to have the same rules. Be firm, and in constant contact with the school. Do not be afraid to contact the teacher with any little concern. It works honest. My daughter was certified at age 3,[she also has separation anxiety]with reinforcement with school and home she learned to get comfortable and talk. It takes time. Be patient, gentle and loving. Have faith-My daughter just graduated from High School and is going on to college in the fall.