“…Popular OELEs that have been found to assist science learning include virtual environments (e.g., Clarke-Midura and Dede, 2010 , Scalise and Clarke-Midura, in press ), science microworlds (e.g., Gobert, Sao Pedro, Baker, Toto, & Montalvo, 2012 ), teachable agents (e.g., Leelawong & Biswas, 2008 ), games (e.g., Shute, Ventura, & Kim, 2013 ), and hypermedia (e.g., Azevedo, 2005 ). Despite the learning opportunities, the non-linearity and open-endedness of OELEs also impose challenges on learners in terms of extraneous cognitive load and greater requirements for self-regulated learning ( Azevedo, 2005 , Moos, 2009 , Moos and Azevedo, 2008 , Jiang et al, 2018 ).…”