The impact of a teaching intervention on sixth grade students' fraction understanding and their performance in seven abilities that constitute fraction understanding

In a previous study, we found that students' abilities in fraction recognition, definitions and explanations, argumentations and justifications, relative magnitude of fractions, representations, connections and reflection constitute fraction understanding of sixth grade students. In the present study, we examine the impact of an intervention comprising of lessons for developing the seven abilities on students' fraction understanding and their performance in the seven abilities. The sample comprised of 343 sixth grade students. Repeated measures analysis showed that the students of the experimental group outperformed those of the control group in their level of fraction understanding and their ability in fraction recognition, definitions and explanations, argumentations and justifications, connections and reflection.