The problem of this study is represented by one main question: What is the effect of suggested educational software based on electronic reading activities in teaching grammatical concepts on the development of deductive thinking Skills of First Year Secondary Students? This main question includes the following minor questions: 1. What are the deductive thinking skills there are suitable for teaching grammatical concepts to first year high school students? 2. What is the form of the educational software based on electronic reading activities used in developing the deductive thinking skills in teaching grammatical concepts to first year high school students? 3. What is the effectiveness of the educational software based on electronic reading activities used in developing the deductive thinking skills in teaching grammatical concepts to first year high school students? The sample was consisted of 50 students' secondary school taken from Azza Zeidan experimental Language School and sports secondary school for Males and 50 Arabic language teachers and supervisors. The results indicated that: 1. There are statistically significant differences between the observed and expected frequencies of the marks of Arabic language teachers and supervisors and Specialists in methods of teaching Arabic language in the items of the questionnaire of the deductive thinking skills relevant for teaching grammatical concepts to first year high school students by using the educational software based on electronic reading activities as k2 test shows. 2. There are no statistically significant differences between the means of the experimental and control groups in the pre-test of deductive thinking skills of teaching grammatical concepts, students’ marks in the pre -test. 3. There are statistically significant differences between the means of students’ marks in the experimental and control groups in the post-test of deductive thinking skills of teaching grammatical concepts, students’ marks in the post-test.