Purpose: This paper aims to describe the statistical arguments produced by third-grade students (8-9 years old) and to identify the teaching support for collective argumentation in a lesson based on data comparison. A Lesson Study Group researched and planned the lesson around a problem from the official mathematics textbook.…

Mathematics is an important component of our everyday lives. It involves necessary skills, such as computation, problem solving, and critical thinking. In spite of this, a significant portion of our students are unable to demonstrate proficiency. These students are typically the underserved, marginalized students who are over represented in…

This study developed a computer-assisted mathematical problem-solving system in the form of a network instruction website to help low-achieving second- and third-graders in mathematics with word-based addition and subtraction questions in Taiwan. According to Polya's problem-solving model, the system is designed to guide these low-achievers…