A solid foundation in mathematics is beneficial not only for individuals' concurrent and later academic achievement, but also for future career success and financial stability. Rational number knowledge plays a pivotal role in mathematical success, yet it is often regarded as a challenging area to grasp comprehensively. The dissertation aims to…

Four studies are reported that used a metacognitive evaluation procedure that can be group-administered and objectively scored. The procedure assesses the knowledge monitoring component of metacognition by evaluating the discrepancy between students' estimates of how well they are likely to perform on a task and their actual performance. The first…