This study aimed at assessing the training programs for Mathematics teachers at elementary stage on developed Curricula and attitudes toward teaching at Najran educational administration in Saudi Arabia. To achieve this objective, two instruments were developed, one of them measures the opinions of Mathematics teachers about the training programs and the other one measures their attitudes toward teaching the developed Curricula, which were distributed to (72) male and female Mathematics teachers at elementary stage. The results showed that training programs for Mathematics teachers are highly efficient in covering the theoretical background of the project of Mathematics development, content, methods of teaching, activities and educational aids, evaluation, and quality of training. The results also showed Math teachers have positive attitudes towards teaching the developed Curricula, and further concluded that there are no statistically significant differences due to teacher's experience, while there are statistically significant differences attributed to gender in favor of female teachers.