Positive teacher-student interaction can exert a positive influence on student engagement and math performance. As an important part of teacher-student interaction, emotional support of a teacher plays an indispensable role in the math performance of junior middle school and elementary school students. This study aimed to explore the effects of teacher's emotional support on math performance, and examine the mediating role of academic self-efficacy and math behavioral engagement. A total of 1,294 students in grades 3–5 and 7–8 from 14 junior middle and primary schools in China took part in the web-based survey. Results showed the following: (1) academic self-efficacy mediated the relationship between teacher's emotional support and math performance of Chinese primary and middle school boys and girls; math behavioral engagement mediated the relationship between teacher's emotional support and math performance of Chinese primary and middle school boys and girls; (2) The relationship between teacher's emotional support and math performance of Chinese junior middle school boys and girls was mediated by the chain of academic self-efficacy and math behavioral engagement.

Student engagement not only improves student achievement but also affects the dropout rate. Positive classroom interaction between teachers and students enhances student engagement. The interaction between teachers and students is bidirectional, and student engagement can also affect teachers' classroom teaching behavior. Both student engagement and classroom interaction are multidimensional structures, and each dimension is interrelated and mutually influenced. The purpose of this study was to explore the relationship between perceived mathematics classroom interaction and various dimensions of student engagement. In this study, we recruited 1298 students from grades three to five and seven to eight from 36 classes and 15 schools in China participating in a web‐based survey. The results show that cognitive engagement is positively related to behavioral engagement, and emotional support, classroom organization and instructional support play a mediating role between cognitive engagement and behavioral engagement; Emotional engagement is positively related to behavioral engagement, and emotional support and instructional support play a mediating role between emotional engagement and behavioral engagement.

Objectives: This study was designed to find out whether the cognitive-communication training application ‘Talky Land’ can be used as digital therapeutics for children with communication disorders. Methods: Children with language and speech sound disorders were divided into three groups: One group using the Talky Land app (10 children in Talky Land group), the second group using the MITA app (7 children in MITA group), and the third group that only received traditional language therapy (10 children in control group). Changes in vocabulary and articulation before and after intervention among three groups were compared, and changes during the intervention period were observed through additional probe measurements for the Talky Land group. This study also examined changes in the perception of caregivers for applications before and after intervention. Results: All three groups showed significant improvement in vocabulary and articulation post-intervention compared to pre-intervention; with the Talky Land group showing strength in receptive vocabulary compared to the other two groups. In the Talky land group, the children’s progress varied somewhat depending on their baseline levels. And caregivers had a more positive perception of the value of the application as an education or treatment tool after intervention than before intervention. Conclusion: The results of this study will be used to further enhance Talky Land and contribute to its completion as digital therapeutics.

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