This document contains an early childhood readiness checklist that assesses children from birth to age 4 in key developmental areas. It evaluates social-emotional development, physical development, cognitive development, and scientific thinking. The checklist uses a rating scale of M for mastered, D for developing, and B for beginning to rate the child's skills in areas like social play, motor skills, language, literacy, math concepts and using their senses. The goal is to track each child's progress in important developmental milestones from ages 0 to 4.