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.
Preschool Teacher Educational Requirements. Each state differs in its required education level to become a licensed preschool teacher. Most states require a 2-year associate's degree. According to the U.S. Bureau of Labor Statistics (BLS), some childcare centers only require a high school diploma and the CDA.