Basic elements of education (three elements version 2): including educators, educatees and educational intermediary systems.
Basic elements of education (four elements theory): including educators, educatees, educational content and educational means (educational activities).
The basic elements of education (five elements theory): including educators, educatees, educational methods, educational contents and educational environment.
Basic elements of education (six elements theory): including educators, educatees, educational content, educational means (various ways), educational channels (channels) and educational environment.