Despite significant increases in public spending on primary and secondary education in OECD countries, concerns linger about both the efficiency and effectiveness of the school sector. In response to these concerns, governments around the world have introduced a range of strategies aimed at improving the financing and delivery of school-level education. These strategies have included reductions in class sizes, increases in teacher salaries, curriculum reforms and market-based reforms that involve the decentralization of education decision-making and encourage choice and competition.