During the 1960s, the United States underwent significant social and economic changes under President Lyndon B. Johnson's 'Great Society' program. This initiative aimed to eliminate poverty and racial injustice while expanding access to education, healthcare, and civic participation. Various legislation was enacted to improve domestic welfare programs and enhance civil rights. One key component of the Great Society was its investment in educational programs and reforms. Which of the following was a major legislative achievement of the Great Society that focused on improving educational opportunities?