Webour clinically relevant ‘red flags’ milestone chart uses the uppermost published age limits for items (as opposed to median age, which is frequently used for novice learners) so. Websubject matter experts identified by the aap established 11 criteria for cdc milestone checklists, including using milestones most children (≥75%) would be. Webhow your child plays, learns, speaks, acts, and moves offers important clues about your child’s development. Developmental milestones are things most children can do by a.