Other things being equal, students in Colombia's innovative multigrade rural school program achieve higher achievement scores than their counterparts in traditional schoolsat unit costs that appear to be only 5 to IQ percent higher.Policy Research WorkingPapers disseninate thc findings of work i progress and encourage the exchange of ideas amongBank staff and aU others interested in developiment issues. These papers carry the names of the authors, reflect only thei views, and should be used and cited accordingly. The findings, interpretations, and conclusions are the authors' own. They should not be attributed to the World Bank, its Board of D;rectors, its management, or any of iLs member countnes.
The Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished. The papers carry the names of the authors and should be cited accordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent.
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