“…One finding substantiated by factor analyses and interventions is that spatial skills are more closely related to novel mathematical and scientific content than to STEM skills that are more familiar (Stieff, 2013 ; Mix et al, 2016 ), suggesting that it may be particularly important to provide students with spatial scaffolding when students are learning a new mathematical concept. Another set of findings suggests that providing students with a repertoire of spatial tools, such as gesture, rich spatial language, diagrams, and spatial analogies, (Newcombe, 2010 ; Levine et al, 2018 ) can facilitate their spatial thinking. Moreover, these tools, as well as 3-D manipulatives (Mix, 2010 ) have been found to facilitate learning mathematical concepts (e.g., Richland et al, 2012 ; Verdine et al, 2014 ; Hawes et al, 2017 ; Mix et al, 2017b ).…”