This study aimed at identifying the effect of the mobile gaming in the mathematical achievement among the 4th graders. The study instrument was a math achievement test consisted of (30) items of the multiple choice type (4 alternatives). The sample consisted of (66) students of the 4th grade in the City of Zarqa (Jordan), which was distributed over two groups: experimental groups (n=34), and control group (n=32). The researcher employed the experimental method on both groups. The experimental group was taught using the educational mobile games, and the control group was taught by the conventional method. The study found that the use of mobile games is an effective practice for providing educational support to the students in mathematics. In addition, the size of the effect of using the mobile games was significant, which supports the effectiveness of the mobile games in math achievement among the 4th graders.