“…Then, the teacher would support students in making small model revisions, that is, in producing a series of intermediate (partial) models until the development of a target model (which, according to him, may not be the model accepted by scientists, but is the one that includes the knowledge that the teacher expects students to acquire at that moment). It seems there was a general agreement around this model-evolution idea among those who have been working on modelling-based teaching, in particular those who approached it from the 'construction of a model de novo ' perspective (for instance, those from Clement's group, whose main ideas are presented in the book 'Model Based Learning and Instruction in Science' or in other papers (for example, Khan, 2007 ;Williams & Clement, 2015 ), or from other research groups (for instance, Hubber & Tytler, 2013 ;Justi & Gilbert, 2003 ;Maia & Justi, 2009b ;Mendonça & Justi, 2011 ;Schwarz & Gwekwerere, 2007 ;Schwarz et al, 2009 )). Some points distinguish Clement's work from these and other research groups, but the main issue is how each group views the process of model evolution.…”