This news item was stolen, in its entirety, from the science newslist Eurekalert :
Regular computer use for work, but not play, aids student test performance
A new Boston College/UMass study reveals that the more students used computers for school work, the better they performed on a state language/arts test. Conversely, students' recreational use of computers to play games, explore the Internet for fun, or chat with friends at home had a negative effect on their reading scores.
Source: US Department of Education