College instructors teach classes at community colleges, technical colleges, and four-year universities. They teach a wide variety of different subjects, depending on their specific field of expertise. Your main duties include creating lesson plans, giving lectures, grading assignments, and administering tests. You work directly with students, and collaborate with other teachers and school administrative staff to determine curriculum, changes to the department, and other ways to support students. Most college instructors also have "office hours" to provide help to students who need assistance with their assignments. College instructors who have doctoral degrees and several years of teaching experience may seek tenure-track positions that provide job security.