“…For preschool and kindergarten students, mathematical vocabulary knowledge is related to early number skills (Hornburg et al, 2018;Purpura & Reid, 2016;Toll & Van Luit, 2014), mediates relations between vocabulary and early number skills (Purpura & Reid, 2016;Toll & Van Luit, 2014), and accounts for growth in early number skills (Toll & Van Luit, 2014). Similarly, with school-aged students, mathematical vocabulary knowledge is related to number skills for first through fifth graders (Peng & Lin, 2019;Powell & Nelson, 2017) and mediates some of the relation between vocabulary and word problem solving for second, third and fifth graders (Xu et al , in review;Peng & Lin, 2019). Thus, these findings suggest that fraction learning will also be related to students' general and math-specific vocabulary knowledge.…”