Here are three of the several theories that form the framework of simSchool:
Five Factor Model
Big Five
Circumplex Interpersonal Theory Model
Interpersonal
Complementarity
Circumplex graphic
Myers-Briggs Type Indicators
http://www.teamtechnology.co.uk/tt/t-articl/mb-simpl.htm
http://www.humanmetrics.com/cgi-win/jungtype.htm
http://en.wikipedia.org/wiki/Myers-Briggs_Type_Indicator