The research aims to know the effect of the strategy (T-shape) on the academic achievement of chemistry for second year middle school students. To achieve the goal of the research, the following null hypothesis was formulated: There is no statistically significant difference at the level of significance (0.05) between the average scores of the experimental group students who study according to the T-shape strategy and the average scores of the control group students who study according to the usual method in the academic achievement test for chemistry. The researcher adopted the experimental research method, which is represented by designing the post-test with partial control for two independent equal groups. Al-Khalidiya for girls (by lottery method), then two divisions of the second intermediate class were chosen randomly (by lottery method) to represent the (B) division of the experimental group that was studied according to the strategy (T-shape), and Division (C) the control group that was studied according to the usual method If the research sample reached (60) students, with (30) students for each group, and parity was made between the two groups in some variables that could affect the results of the research by participating with the independent variable.
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