
Why U.S. Public Education Became So Expensive
This chart illustrates a major driver behind the rising costs of U.S. public education. Between 1970 and 2018, public school enrollment increased by 11.3%, rising from 45.9 million to 51.1 million students. During the same period, the teaching workforce expanded at a much faster rate, growing from 2 million to 3.17 million. This change lowered the student-teacher ratio from 23:1 to 16:1.
The most significant shift occurred outside the classroom. Non-teaching personnel expanded rapidly and eventually outnumbered teachers. While this category includes essential roles like aides, counselors, and librarians, every additional position adds salaries, benefits, and administrative overhead to the payroll. Because staffing growth dramatically outpaced student enrollment, the resulting budget pressure remains a direct consequence of a vastly expanded school system.