Include handouts, prayers, offerings, and mission speakers. During junior and senior high school years, give project assignments that will personally take the students into mission arenas or will give opportunity to research ethnic and people groups for evangelization possibilities. Remember their mission activities by offering the chance to report on college mission work to the whole congregation. Regularly invite mission speakers to make presentations. Most missionaries are eager to share the Word and the story of their work.
Individuals can read up on ministries and then share the exciting report.
Offer to give time for a conversation partnership with an international student. Serve coffee, tea, and American sweets to both Americans and internationals. Be in the specific places on campus where different nationalities consistently congregate. In stores, doctor's offices, bus stations, etc. recognize people from other cultures, be sensitive to their needs, and offer to be of assistance to them if that seems appropriate and loving. Take a trip to a nearby campus to have lunch in the cafeteria where international students gather.