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.
John B. Watson and Jean-Jacques Rousseau are typically cited as providing the foundations for modern developmental psychology. In the mid-18th century Jean Jacques Rousseau described three stages of development: infants (infancy), puer (childhood) and adolescence in Emile: Or, On Education.