How did Charles Schulz have his art education?

Charles Schulz brought happiness to millions of people. He was born in 1922 in Minneapolis, Minnesota. His father was a barber who cut men’s hair. When Charles was five, his teacher told him："Some day, Charles, you’re going to be an artist." But he sometimes had trouble with his school work. In high school, he was poor at sports. He was afraid to ask a girl to go out with him. His high school publication rejected some of his drawings he hoped it would publish. At age seventeen, Charles began studying art. He took a class by mail from a Minnesota art school. This was the only art education he ever had.