How should we teach philosophy in high schools? While electives are useful, I advocate going further to integrate philosophy into each traditional subject. High school instructors, working with philosophers, first teach logic as a foundation for asking philosophical questions within their subjects. Students are then encouraged to think about how they reason and what assumptions they are making in each subject. In English, students might consider what makes a novel a work of art; in science, they might explore what it means to call a theory “true.” Unlike an elective model, my approach ensures that all students benefit from philosophy during their secondary education. I conclude the paper with suggestions for implementation.