This study aimed to investigate the effect of an educational program based on a strategy of imagination on the development of critical thinking skills and motivation to learn by the seventh grade students in science as compared to the traditional way. The study sample consisted of 62 students who were selected deliberately from students at Rehab Basic School in Mafraq Borough Directorate of Education. They were assigned randomly into two groups: experimental group (31 students) which studied using the strategy of imagination, and the control (31 students) which studied using the traditional method. To achieve the objectives of the study, the researcher designed a test to measure critical thinking skills components. It contained 28 multiple-choice questions. It has also prepared a measure of motivation toward learning which contained 38 items. The researcher prepared an educational program based on the strategic imagination to teach scientific concepts in the study of science. The study results showed that there were statistically significant differences between the mean scores of the experimental group which studied science using the strategy of imagination, and the control which studied science using the traditional method., in favor of the experimental group.