The objective of the research was to identify the effectiveness of the Frayer model in modifying the alternative perceptions of some scientific concepts in the second grade students in Tabuk. The research materials and tools were included in the "Student Handbook, the Teacher's Guide in the Plant and Environmental Resources Unit, and the Test of Diagnosing Alternative Scenarios of Scientific Concepts." The semi-experimental-design-based (pre-post) approach was applied to a random sample of 60

more »

... male students The second was the average grade in the city of Tabuk, where the sample was divided into two groups, one experimental and the other control, divided equally (30) in each group. The statistical treatment was done using frequencies and averages, T test for independent samples, : • There are many alternative perceptions of scientific concepts in the plant and environmental resources unit of the students sample research, and some of them a large proportion up to (91.6%). • There was a statistically significant difference at (α0.05) between the mean scores of the experimental and control groups in the post-application to test the diagnosis of alternative perceptions of some scientific concepts for the benefit of the experimental group students. • The low percentage of alternative perceptions of all scientific concepts in the post-test of the experimental group. This indicates the effectiveness of the Fryer model in modifying the alternative perceptions of the scientific concepts of second-grade students in Tabuk. • The researcher recommends the use of modern strategies that help to modify the alternative perceptions of the scientific concepts of learners.