World Bank Economist Felipe Barrera-Osorio, working with Leigh Linden of Columbia University, has just published a very useful and rigorous study on the impact of ICT use in Colombia.
The Use and Misuse of Computers in Education: Evidence from a Randomized Experiment in Colombia (PDF) looked at 97 schools and 5,201 children over two years of participation in the Computers for Schools program.
While some readers may immediately latch onto the finding that the program "had little effect on students’ test scores", I found the potential explanation for this lack of positive impact to be even more valuable:
"The main reason for these results seems to be the failure to incorporate the computers into the educational process. Although the program increased the number of computers in the treatment schools and provided training to the teachers on how to use the computers in their classrooms, surveys of both teachers and students suggest that teachers did not incorporate the computers into their curriculum."