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Mathematics teachers generally work with middle-, high-school, or postsecondary students. They lecture, direct discussions, and test students' knowledge with exams, essays, and homework assignments. Teachers also develop teaching outlines and lesson plans, facilitate activities, keep class attendance records, and evaluate student progress. There are approximately 946,730 secondary school teachers and 621,970 middle school teachers employed in the United States, as well as 53,970 postsecondary mathematics teachers.