Some communities have adopted an online kindergarten-readiness program called Waterford Upstart, operated by nonprofit organization Waterford.org. Advocates say that the program is a high-quality, cost-effective preschool program that rivals some brick-and-mortar options, but critics say that these programs raise questions about education quality and what exactly preschool is meant to teach. As the economic chasm in the United States grows, experts remark that having access to human interaction is becoming a stark dividing line through every stage of life.