“…Aside from that, the authors have pointed out differences in the effects of problem-based learning (Hidayati et al, 2020;Sudia and Muhammad, 2020); and another study is based on project-based learning models without scaffolding (Paruntu et al, 2018). Meanwhile, some authors hope to improve students' mathematical communication skills through learning models such as digital teaching module (Setiyani et al, 2020), cooperative learning (Salsabil et al, 2017), ASSURE learning (Sundayana et al, 2017), learning devices based on constructivism approach (Zulaika and Syarifuddin, 2018), problem-posing and think-pair-share learning models (Rohim and Umam, 2019), school location (Juliarta and Landong, 2020), self-regulated learning (Sudia and Muhammad, 2020), quantum learning (Utari et al, 2020). Reikerås (2020) says that in toddlers, play abilities and mathematical abilities are linked, including the capability for mathematical communication.…”