Abstract
The study aimed to identify the impact of the educational portfolio for mathematics on the achievement of students. The researchers applied the mixed approach. The study tools were an attainment test and focus groups. The study sample consisted of (871) students from (12) schools from the three regions divided into two groups experimental and control groups. The results showed that; there were no statistically significant differences in the average performance of the fourth grade. It also showed that there were statistically significant differences in the average performance of the eighth grade students in favor of the experimental group. While it indicated that there were no statistically significant differences in the average performance of fourth grade due to the gender variable; it showed that there were statistically significant differences in the average performance of eighth grade students due to the gender in favor of males. Regard to the region variable, the results showed that there were significant differences in the average attainment of fourth and eighth grade students in mathematics due to the region.