USA education, preschool

In the USA education system there is no clear definition of preschool. The general term is all schooling before 5 yrs old, but even the 5 yr old grade is not standard.

Grade naming

Convention 1

• 2 year old - Preschool
• 3 year old - Nursery
• 4 year old - Kindergarten
• 5 year old - Pre-1A

Convention 2

• 3 year old - K3
• 4 year old - K4
• 5 year old - K5

Convention 3

• 1 year old - Infant room
• 2 year old - Toddler room
• 3 year old - Nursery
• 4 year old - Preschool
• 5 year old - Kindergarten