Understanding science involves the mastery of complex networks of conc
epts. To design effective computer based systems for learning science
it is essential to adequately characterize the nature of those concept
ual networks. This paper considers a novel class of representations fo
r science instruction - Law Encoding Diagrams (LEDs) - and describes t
he nature of scientific understanding based on these representations.
A framework of four classes of schemas has been proposed to characteri
ze knowledge acquisition and problem solving with LEDs. How the framew
ork encompasses complex networks of concepts is discussed and the impl
ications for the design of computer based learning environments based
on LEDs are considered.