Susan Rodgers has substituted in K12 classrooms in North Idaho for 30 years.
Some days are spent working one-on-one with special education students; on other days she might be managing a kindergarten classroom or teaching high school math.
The 54-year-old works almost every day, she said.
Her qualifications: an associate degree in elementary education, enough assertiveness to manage a class of even the rowdiest students and a good reputation among teachers.
From kindergarten to graduation, an average student will have spent more than a year being taught by a substitute teacher.
Depending on the state, the quality of the education provided by “subs” varies.
Twenty-eight states require no more than a high school diploma for those temporary teachers, according to national data. Seven require some college education, and 15 states require substitutes to have a college degree.