When teachers discuss college, students are exposed to the idea of college. Talking about college every day in lessons or in normal conversation helps students think about college every day—which is the goal of a college-going culture. Also, when you describe your own personal college experiences, students learn what to expect when they go to college.
Warning: The College Board warns that even good-intentioned college-going programs can negatively impact the school if the school staff does not share a common goal. Be sure your school's staff supports your school's college-going culture. You can bring together your school's staff by discussing how a college-going culture positively impacts schools, staff members, and (most importantly) students.