U S Schooling?

Question

for my novel i need to know dose anyone know anything about US schooling system. i need to know at what ages kids enter into each of the different levels and more importantly what they learn in each secotion. i.e what lessons would a typical 16 year old take and would that be in highschool.

Answer 1

Kindergarten at age 5

Grade 1 (primary school) at age 6

middle school at age 12

high school at age 14

a 16 year old would be in the 3rd year of high school (out of 4)