The current research aims to know (the effect of Bayer's strategy on developing divergent thinking among second-grade intermediate students in the subject of Arab-Islamic history) . In order to achieve the goal of the research, the researcher puts the following null hypothesis : 1.There is no statistically significant difference at the level of significance (0.05) between the mean scores of the experimental group students who study according to the Bayer strategy and the average scores of the control group students who study in the traditional way in the dimensional divergent thinking test . The researcher chose an experimental design with two groups, one experimental and the other a control, and the two research groups (experimental - control) were rewarded with the following variables : (Chronological age in months, grades of the previous year, IQ test, pre-branched thinking test ) . The current research was limited to second-grade intermediate students in (Al-Furat Intermediate School for Boys), which is one of the schools affiliated to the city of Baghdad / Directorate of Education Al-Karkh First. (32) students, and the second represented the control group who were studying the same subject in the traditional way, and they numbered (31) students. Thus, the number of the research sample reached (63) students. 2017-2018 . The researcher prepared the divergent thinking test in light of the steps and main questions of the Sheikhly test (2001) in measuring the ability of divergent thinking of the students of the research sample . : The search results showed .The experimental group students who study history according to the Bayer strategy outperformed the control group students who study history using the traditional method in the dimensional branched thinking test . Keyword: Divergent thinking Bayer Stratagy