This study investigated the comparative efficiency of computer-assisted instruction (CAI) and traditional teaching methods on tenth-graders' learning of earth science in Taiwan. A total of 151 students enrolled in four earth science classes participated in this pretest/post-test control-group experiment. Experimental-group students learned earth science concepts through the CAI, whereas comparison group students were taught by a traditional approach. Results include: (1) Students in the experimental group had significantly higher achievement scores than did students in the comparison group (F = 4.90, p<.05); (2) There were also statistically significant differences in favor of CAI on students' test performance, especially on the knowledge (F = 8.00, p<.005) and comprehension (F = 5.80, p<.05) test items, but not on the application (F = 0.12, p>.05) test items. These findings suggest that incorporating CAI into secondary schools has promise in helping students' grasp of earth science concepts.
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