Difference Between Convergent and Divergent Evolution. When considering living organisms, evolution can be defined as the development of differentiated organisms from less differentiated pre-existing organisms over the course of time. There are many sources, which provide evidence to the theory of evolution.
You're apparently differentiating between daycare and preschool, right? Private preschools (about $500 per month for three days per week, 9:00a to 1:00p) typically have a minimum age of 30 months (2.5 years) and potty-trained.
Educational Requirements for Preschool Teachers. Education requirements to become a preschool teacher vary. Public schools require at least a bachelor's degree; while an associate's degree or high school diploma is acceptable for some child care centers. In many cases, preschool teachers start out as assistant teachers.