The purpose of this study was to consider instructions for maintaining a safe environment and correct awareness of radiation. Lessons on “Knowledge of Radiation” and “Radiation and Health” were given to ninth-grade students. Effects of learning were evaluated before and after classes. Teachers made students put environmental measurement to cultivate their scientific knowledge of radiation in science classes. Classes also addressed the scientific basis through data and experiments. In school health field, teachers asked students to consider relationships between daily life and health, using knowledge learned in science classes. Moreover, teachers guided the students’ means of collecting information to improve their daily life and ability to deal with health problems in the event of environmental changes. The instruction that linked science with school health tied daily lives to scientific knowledge. This instruction can make a contribution to an education that develops a “Zest for Living”. In the future, this instruction can be more effective by incorporating school health into social studies, industrial arts and homemaking.