Are you new to the Horizon Elementary community? To register your child, you will need verification of birth date, names and phone numbers of emergency contacts, an up-to-date immunization record, and proof of residence-such as a utility bill or lease agreement. Kindergarten registration begins in March for the following school year. To be eligible for Kindergarten, a child must be 5 years old on or before August 31 of that year. For more information, call our office-425-366-3000.