Here are some links to additional information about Speech and Language Development and your child:
Mid-State Early Childhood Direction Center - checklists about development
http://ecdc.syr.edu/resources/checklists/
Mid-State Early Childhood Direction Center - resource page for a range of learning and developmental challenges
http://ecdc.syr.edu/links/
National Association for the Education of Young Children - article about the importance of reading to children
https://www.naeyc.org/files/yc/file/200303/ReadingAloud.pdf
Speech Sound Development Chart
http://mommyspeechtherapy.com/wp-content/downloads/forms/sound_development_chart.pdf