4C/ID Model is a An instructional design model formulated by van Merrienboer focusing on complex cognitive skills 
Cognitive Load Theory is a A theory proposed by john Swefler and his associates focusing on working memory's role in instructional design 
Design Principle is a Rule guiding how instructional programs are structured 
Extraneous Cognitive Load is a Cognitive load that is related to features of instructional design 
Nonrecurrent Skills is a Schemalike controlled processes in complex cognitive skills