The study developed a series of activities on the natural environment. Students of Grade 5 students Muang District, Nakhon Si Ayutthaya. The purpose of the research request To develop a series of activities on the natural environment. To study and compare the outcomes after learning. And compare the knowledge of male and female students with different learning achievement. And satisfaction to their study results showed that the set of conservation activities. Natural Environment Effective 83.75 / 88.10 Students studying with the natural environment conservation activities with student achievement increases of teachers. Statistically significant at the .05 level. Male and female students' learning achievement is no different. And students are satisfied with the teachers at the high level of activity by the effective conservation of the natural environment is appropriate for the student achievement increased and consistent with your research.achievement increased and consistent with our research.