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.
I think three is a very good age to start preschool. It gives the child a two year head start on getting ready for school. I don't see a downside to this at all.enerally speaking, age 3 is a wonderful time to send a child to school. Developmental psychologists generally look at developent in several 3 year age spans. 0-3, 3-6, 6-9, 9-12. So he is in a different developmental stage now that he is 3. A good preschool will help him with the stage he is in.