How and when do children go to school in The Giver?

In Jonas's community, children go to school from a young
age and continue until they reach adulthood, but the training changes.  Early training
focuses on teaching children to be obedient and use language properly.  This begins
at the toddler age.  Babies are raised by Nurturers until they reach about a year old
(although "one year" varies, depending on when they were born in the year, and some
children are older than others when they join the group of ones).  Toddlers are raised
by their families except when their parents are at work, when they are in Childcare
groups.

When school begins, the lessons focus more and more
on proper use of language and obeying social norms.  The goal is to make the children as
much the same as possible.  Each year, they have a ceremony where all of the children
born in a year are given different objects that symbolize growth to adulthood.  These
include tunics that button in the front and  bicycles.  At some ceremonies they give up
items, such as hair ribbons and the comfort objects they attain when they are
babies.

As children get older, they begin to volunteer with
adults in careers.  They choose the service, and are supposed to vary it when they first
begin.  As they get older, they gravitate toward areas of interest.  At the same time,
they are observed constantly by the Committee.  When they turn 12, they are assigned to
their adult careers.

After 12, school continues and
training begins after school.  As the children get older, they attend school less and
less and training more and more, until they are fully trained and begin their adult
career.