High school teachers work for schools that enroll students from grades 9-10. They typically instruct students on a single subject, such as English, math, science, history, language or art. To do so, they must plan curricular, which may cover basic topics in algebra to advanced information on psychology.High school teachers can be influential in students’ lives, since students will apply what they learn to their future endeavors. Though teaching can be rewarding, high school teachers may have challenging jobs when dealing with unmotivated or disruptive students. Stress can occur when facilities aren’t up to standards, workloads become difficult to manage and teachers work more than 40 hours per week.