American schools are organized into elementary (pre-K-5), middle (6-8), and high school (9-12). Students typically attend school from ages 5 to 16 or 18. There are approximately 50 million students enrolled in US public schools, with the largest enrollments in southern states. Public education is paid for through a combination of federal, state, and local taxes, with most funds coming from state and local sources. Common subjects of study include science, math, English, social studies, arts, languages, technology, and physical education. The ethnic makeup of public schools is diverse, with over 50% white students and growing Hispanic and Asian populations.