All children develop at their own rate. There are established levels in development expected for children at certain ages and stages. The areas of development that affect learning are listed below and need to be watched and checked if there are concerns: Physical: development of fine and/or gross motor muscle skills and sensory (including vision and hearing); Cognitive: development of thinking, mental or problem-solving skills; Language/Communication: skills in receiving information (receptive) and expressing Information understood (expressive); Social/Emotional: internal and external adaptation to environmental stimuli development; and Self-help: adaptive development to attain basic needs.   If you know of a child under the age of 3 that should be referred for a screening, the family needs to be referred to the Arizona Early Intervention Program known as AzEIP. The AzEIP web site has "A Checklist for Your Child's Growth from Birth to Five". It is recommended that you review the checklist for your child's development to date. If you have concerns about your child's development, click on How do I know if my child needs early intervention? and How do I refer my child to AzEIP?