Study a developmental checklist to determine if your child has a possible developmental delay or disability. There are many milestone checklists available online. Another resource is your local pediatrician. He will be able to instruct you on developmental milestones your child should have reached by certain ages. These milestones include speech, motor skills and social behaviors.
Contact your state's early intervention office, if your child is 0-3 years old. If you cannot find the contact information for this department, your local public school will be able to guide you in the right direction. Alternatively, if your child is over 3 years, but not in Kindergarten yet, contact your local school district. Your pediatrician is also able to refer your child to early intervention services for assessment.
Request an assessment to determine eligibility for intervention or special education services. The assessment may take place in your home, school or other facility. Many areas will be evaluated during this time. These include physical development such as movement, muscle control, balance, motor skills and coordination; cognitive skills such as thinking, learning and reasoning; communication skills, relating to others, expressing feelings and self-help skills.