Why do Amish children only attend school through the 8th grade?

Why do Amish children only attend school through the 8th grade?

The Amish have always believed that too much education, or worlaly wisdom, makes one proud. To them, an eighth grade education is sufficient, although they do further their education by training as apprentices for their future jobs.

The Amish believe that the strongest education their children receive should be from the .