I highly recommend this book from a great publisher which offers clear and concise descriptions of children's development at each age with implications for the classroom. Written with warmth, humor, and deep reverence for children, the book would assist teachers and principals use knowledge of child development to shape classrooms. at each age the book includes: a narrative description of developmental traits charts summarizing physical, social, language, and cognitive growth patterns charts summarizing implications for the curriculum available from the publisher - Responsive Classroom - 800-360-6332 or from their website: www.responsiveclassroom.org or from where I got it - www. amazon.com. The price is $16.95 the website and catalog has terrific resouces for teachers and principals