About a decade ago, Hoadley and Carr-Chellman edited a special issue in Educational Technology (44(3), 2004), that sought to begin a dialogue between two substantive fields of research that are concerned with TEL design and evaluation. Despite their many overlapping interests, according to Hoadley and Carr-Chellman, these two fields, Learning Sciences (LS) and Instructional Systems Design (ISD), had very little interaction and cross fertilization. Both fields have had common interests such as cognitive psychology, educational psychology, situated cognition, educational technology, constructivist learning environments, computer-supported collaborative learning and computer-supported collaborative work. However, citation analyses conducted by researchers who took part in writing the aforementioned special issue showed that the literature identified within these two fields has very little overlap. Some of the authors described the two research areas as "parallel" and even "colliding universes".In this chapter, we revisit the dialogue that began at this time to present current trends in design and evaluation methods for TEL. Through this lens, we can still see some of this parallelism, which we view as productive, representing unique directions that each of the fields has continued to develop, but we also find emerging trajectories which demonstrate that these perspectives are far less isolated than S. McKenney ( )