The aim of the study was to identify the effectiveness of the development of the agricultural chemistry curriculum for the agricultural secondary students using cooperative learning on the development of their environmental enlightenment Where the problem of the study was determined in the lack of agricultural chemistry curricula for secondary agricultural students in the environmental development of secondary agricultural students And the reluctance of students to study the chemistry of agriculture; because the teaching of agricultural chemistry is not linked to the daily life situations and the environment of agricultural learners , Resulting in low levels of student achievement. Therefore, the researchers developed the tools of the study and represented in the scale of environmental enlightenment and environmental knowledge testing Their stability was calculated by a re-test method, and a teacher's guide was prepared to teach the selected part of the chemistry course using cooperative learning , And finally prepare a student book. The study found that: There are statistically significant differences between the mean scores of the control group and the experimental group in the post-application to test the environmental knowledge for the experimental group, There were statistically significant differences between the mean scores of the control group and the experimental group in the post-application of the experimental scale for the experimental group There are statistically significant differences between the mean and the post-application of the scores of the students of the experimental group to test the environmental knowledge in favor of the post-application. There are statistically significant differences between the average of the tribal application and the post-application of the students of the experimental group of the experimental scale for the post application.