Robert (Bob) Slavin begins this way:

A decade ago when a surge of interest in placing computers in classrooms was joined to available public and private money, U.S. schools went on a rampage of buying and distributing devices to students and teachers. At that time I wrote a post about a puzzling fact that was overlooked or simply ignored:  With increased access to new technologies, there is little reliable and valid evidence showing that these technology investments have yielded gains in student achievement.

How does he look at it today?

Bron: Does Classroom Use of Computers Cause Gains in Students’ Academic Achievement?