Background: Standardised Mandarin assessment tools for examining difficulties in language comprehension and expression at different developmental stages are limited in China. The first comprehensive standardised Mandarin assessment tool is the Diagnostic Receptive and Expressive Assessment of Mandarin-Comprehensive (DREAM-C), which is normed for…

Enhancing students' conceptual understanding is one of the primary goals of science education. Existing literature suggests that the degree of knowledge integration among students can reflect their level of conceptual understanding. This study focuses on the concept of friction force, constructing a cognitive structure model of friction force to…