Vocational courses and classes are offered by a number of institutions. Many high schools offer basic vocational education, such as home economics, woodshop, and auto repair. Vocational educational institutions vary by state, but most postsecondary vocational instruction is offered by private career schools.
Sigmund Freud of Vienna, who is considered as the father of modern psychology, originated a new method called the Free Association Technique. Freud considered that mind has three parts  the conscious, the pre-conscious and the unconscious. He considered that 90% of the mind is the unconscious mind.
According to Erik Erikson, a prominent developmental theorist of the 1950's, youth must resolve two life crises during adolescence. Unlike many other developmental theorists of his era, Erikson's psychosocial theory of human development covers the entire lifespan, including adulthood. Erikson used the term crisis to describe a series of internal conflicts that are linked to developmental stages.