Amir teimury, M. H. , , Badali, M. , and Zarei Zavaraki, E. . "Investigatingthe Efficacy ofMerrill’s First Principles of Instruction on the Students\'Learning and Retention", The Journal of New Thoughts on Education, 9, 4, 2014, 57-75. doi: 10.22051/jontoe.2014.355