Tasks involve the ability to exert moderate, though not constant, physical effort, typically involving some combination of remaining on feet for extended periods of time, climbing and balancing, stooping, kneeling, crouching and crawling, and which may involve some lifting, carrying, pushing and pulling of objects and materials of moderate weight (12-20 pounds to moderately heavy weight (up to 50 pounds). Interacts and communicates with various groups and individuals such as the immediate supervisor, co-workers, instructors, guests (children, parents, adults), school personnel, Ellis & Associate Personnel, volunteers, and the general public.