Original Source MaterialStudentVersionInstructional designers typically employ models to guide their day$-$to$-$day work. Due to the increased practice of the systematic design of instruction in a growing number of settings, available models become more and more proliferated, focusing on particular types and contexts of learning,"The main goal of anyinstructional design process is to construct a learning environment in order to provide learners with the conditions that support desired learning processes" $($van Merri$$nboer$,1997,$ p$.2).$Process models proliferate because more and more designers generate models that