By Kendra K. Naef, CFCS. Grades 6-12.This series identifies six critical windows of opportunity in early childhood brain development: vision, native language, emotional development, vocabulary & speech, math & logic, and music. Each poster contains supporting data, facts, and milestones associated with the respective critical window. The accompanying TearPads (sold separately) provide additional strategies and describe actions parents/caregivers can take to promote development in each critical window during their interactions with young children. Each of the six laminated posters measures 18" x 24".