Level II: Basic requirements and Childhood Development Associate Credential (CDA) that is age appropriate to the children being served in the center-based programs; or a state-awarded certificate for preschool teachers that meets or exceeds the requirement for a CDA, and one year of experience working with preschool children. Physical Requirements & Work Environment: Physical Activity: Frequent listening, talking, standing, walking, climbing, balancing, stooping, kneeling, crouching, crawling, reaching, pushing, lifting, finger use, grasping, feeling, and repetitive motion.