in a Developing C(ountry

Schools in Thailand are more uniformly effective than previous research in developing countries would suggest. Higher levels of math achievement are associated with more qualified math teachers, an enriched curriculum, and frequent use of textbooks. The Policy, Planning, and Research Complex disuibues PPR Working Papers to disserninate the findings of work in progress and to encourage the exchange of ideas among Bank staff and all others interested in development issues. These papers carry the names of the au hors, reflect only their views, and should betused and cited accordingly. Thc findings. interpruations, and conclusions are the authors own. They should not be attributed to the World Bank, its Board of Directors, its management, or any of its member countries. Pu bl ic Di sc lo s