Developmental Milestone - https://www.cdc.gov/ncbddd/actearly/milestones/
First Steps (what is it) - https://www.in.gov/fssa/ddrs/2814.htm
Steps to First Steps-https://www.in.gov/fssa/firststeps/parents/steps-to-first-steps/
People First Language - http://www.thearc.org/who-we-are/media-center/people-first-language