This study was designed to investigate the effect of using SMS via M - Learning and sending instructional materials on student's academic achievement in Bloom's three cognitive levels (remembering, understanding and applying), as well as measuring student's practical skills during the learning process of a course called Designing Instruct ional Software. The course is taught to the Faculty of Education Students at Al - Baha University. The present study adopted the experimental method in order to test the effect of the independent variable on the dependent one. With a sample from Al - Baha Uni versity comprised 30 students divided into two groups; one was the experimental group (15 students) and the other was the control group (15 students, the researcher conducted the study. Achievement and skill performance were measured using an achievement t est and observation card. The data and scores from these tools were collected, Measurements and statistical computation were done using t - test, and Cronbach's Alfa. The results and findings of the study revealed some significant differences between the ex perimental group and control group. There was a significant difference between the mean scores of the control and experimental groups at level 0.05 on the total achievement test (recall ، understanding and application) in favor of the experimental group stu dents. In the light of results of the present study ، the following recommendations may be given. The study may recommend adopting and implementing M - Learning Applications in learning and instruction ، a form that benefits the instructional process. Furthe r more ، the study recommending building M - learning environment . Also ، these shoaled be training courses for staff to assist them designing and developing these systems of learning. Moreover ، local conferences should be held in order to distribute the literacy of M - learning in our educational organizations. Finally ، more research and studies should be conducted in the field of mobile technology and learning.