This study aimed at investigating the effect of using movement-based learning on first graders' mathematical achievement and cognitive curiosity, by using the qausi-experimental approach. To achieve the study aims, a mathematical achievement test for the first grade in the "Location and Movement" unit was administered, its validity and reliability have been verified. Also, a cognitive curiosity scale was administered, its validity and reliability have been verified. The sample of the study consisted of (44) first grade students in Jordan, distributed to two groups, one group chosen randomly as an experimental group who was taught by movement-based learning, and the other group as a control group who was taught using the traditional method of instruction. Results of the study revealed that movement-based learning had a positive effect on improving students' mathematical achievement, and their cognitive curiosity. In light of the study results, it was recommended to use the movement-based learning method in teaching mathematics.