This is a good graphic that can be used by both teachers and professionals. It outlines the main developmental milestones that children who are typically developing go through so they can screen for red flags.
This is the link to the NJ Core Curriculum Content Standards for Science - 5.3 Life Science. Strand C. Interdependence is the basis for our cluster. Image from http://www.state.nj.us/education/cccs/standards/5/5-3.htm