Education in its general sense is a form of learning in which the knowledge, skills, and habits of a group of people are transferred from one generation to the next through teaching, training, or research. Anyexperience that has a formative effect on the way one thinks, feels, or acts may be considered educational.

Primary schools

http://en.wikipedia.org/wiki/Primary_education

Secondary schools

http://en.wikipedia.org/wiki/Secondary_education

Systems of higher education 

http://en.wikipedia.org/wiki/Higher_education