Lucy Sprague Mitchell was an education reformer born in 1878 who established the Bureau of Educational Experiments in New York. She was influenced by John Dewey's progressive ideas about education and believed that children learn best through experiences connected to others. At the Bureau, Mitchell incorporated interdisciplinary teaching, student behavior studies, and family background checks. Her school programs were seen as radical at the time but became the model for modern nursery schools. Mitchell promoted the idea of raising "whole children" by fulfilling their emotional, social, and mental needs, not just physical ones. She trained teachers to become "whole teachers" and guide children to their full potential.