As a parent, it is important to know when certain sounds and skills are mastered by your child. If your child has not yet mastered a sound, please know that it is not always indicative of a speech and language impairment. Feel free to speak with your child's physician and/or school district's Speech and Language Pathologist to determine if a referral for an evaluation would be appropriate. 

The American Speech-Language-Hearing Association has developed some information for parents in regards to speech and language development. Feel free to check out the links below:

Typical Speech and Language Development

http://www.asha.org/public/speech/development/

Your Child's Communication Development: Kindergarten Through Fifth Grade

http://www.asha.org/public/speech/development/communicationdevelopment/