The research aims to examine the effect of KUD strategy on acquiring the grammatical concepts among intermediate school students. To achieve the research objective, the researcher adopted the null hypothesis in which there is no statistically significant difference at the level (0.05) between the average scores of students of the experimental group who study grammar base on the KUD strategy and the average scores of the control group who study the grammar through the traditional way of acquiring grammatical concepts. In a random manner, the researcher selected the research sample from one of Baghdad’s education schools in al Rusafa / 2, as the total number of students of the two groups reached (67) students. They were divided into (33) students as an experimental group and (34) students as a control group. There is a statistically significant difference between the experimental group who are studying grammar according to the KUD strategy and the average scores of students within the control group who study grammar in the traditional way in acquiring grammatical concepts at the level (0.05) In favor of the experimental group. The researcher came out with a set of recommendations and suggestions though supporting Arabic language teachers to use this strategy in teaching.