The Effect of Instructional Multimedia on Learning Biology

The purpose of this study was to investigate the effect of instructional multimedia by observing the principle of Meyer's pre-training on improving the learning biology of the 10th grade students of high school in Naqadeh city with a quasi-experimental method. The statistical population of the study included all male students who selected this lesson in 2015-2016, that 75 students were chosen by cluster sampling method and randomly divided into three groups of 25 students, including experimental groups "A and B" and control group. The data gathering tool was a researcher-made test; the validity of the test was confirmed by the teachers in two sessions and their corrections, and reliability was performed by Cronbach's alpha method, which was 0.73, and the test-retest method with a reliability coefficient of 0.86. At first, the pre-test was performed in three groups. Then, the experimental group "A" with multimedia containing pre-training concepts and the experimental group "B" with multimedia without these concepts were trained in four sessions using a researcher-made multimedia software and the control group received training in a conventional way. At the end of the training, post-test was done for all three groups. The covariance analysis test has been used to test the research hypothesis. Generally, the results of the study indicated that instructional multimedia with respect to the principle of Mayer pre-training improved students learning. Therefore, the results of the present study showed the positive effect of instructional multimedia by observing the principle of Mayer's pre-training in enhancing biology learning of the students.