This study aimed to evaluate the content validity of the developed Earth Science module in Senior High School. The study utilized the descriptive method of research in order to gather information about the content validity of the developed module in Earth Science in terms of instructional objectives, content/ structure, learning activities and form of evaluation. Validation was done by science teachers from both public and private schools with STEM track program in Lucena and Metro Lucena. The data were analyzed using descriptive and inferential statistics. Findings revealed that the group of teachers who validated the content of the developed module was considered experts in their field. In addition, both the teacher and student- respondents find the developed Earth Science module acceptable in terms of its instructional objectives, structure, learning activities and form of evaluation. They recognized it as another form and useful instructional material to be used in the teaching-learning process in Senior High School. Both the teachers and students can also use the developed module in Earth Science to facilitate the teaching-learning process more effectively. However, review and enhancement of the module should still be done constantly to match the necessities and capacities of the students.