The relation to operands (RO) principles describe the relation between operands and answers in arithmetic problems (e.g., the sum is always larger than its positive addends). Despite being a fundamental property of arithmetic, its empirical relation with arithmetic/algebraic problem solving has seldom been investigated. The current longitudinal…

This study aimed to investigate differences in the mathematical problem-solving and metacognitive skills of the fifth-grade students in Oman as a function of gender and level of academic achievement. The participants were 90 grade five students randomly selected from one educational governorate in the Sultanate of Oman. They were evenly divided…

In this quasi-experimental study, 142 fifth and sixth grade students at a suburban elementary school in Northwest Washington State participated in a week-long, 10-hour project using the "LEGO Mindstorms Robotics Invention System" (RIS). Partners constructed and programmed one robot from visually-based LEGO instructions and a second of…