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.
Jean Piaget's Theory Of Cognitive Development. Jean Piaget is perhaps one of the most well-known and influential child development specialists. His work was first published during the 1920's, but his theory of cognitive development continues to influence contemporary researchers and clinicians. Piaget's identified five characteristic indicators of adolescent cognitive development and named them as follows: 1) formal operations, 2) hypothetico-deductive reasoning, 3) propositional thought, 4) the imaginary audience, and 5) the personal fable.