Joliet Central High School students Kevin Cruz, left, and Terion Chilps work on their new laptop computer at the school in Joliet, IL on Friday September 7, 2012. When school began two weeks ago, every freshman at Joliet Township High School was issued a laptop -- a first in school history. | Matt Marton~Sun-Times Media
Darcy Newell, right, a teacher at Joliet Central High School, works with sudens on her new laptop computer at the school in Joliet, IL on Friday September 7, 2012. When school began two weeks ago, every freshman at Joliet Township High School was issued a laptop -- a first in school history. | Matt Marton~Sun-Times Media
Tiffany Hughes , a student at Joliet Central High School, works on her new laptop computer at the school in Joliet, IL on Friday September 7, 2012. When school began two weeks ago, every freshman at Joliet Township High School was issued a laptop -- a first in school history. | Matt Marton~Sun-Times Media
Darcy Newell, right, a teacher at Joliet Central High School, works with sudent Alexandria Guzman on her new laptop computer at the school in Joliet, IL on Friday September 7, 2012. When school began two weeks ago, every freshman at Joliet Township High School was issued a laptop -- a first in school history. | Matt Marton~Sun-Times Media
A student works on her new laptop computer at the school in Joliet, IL on Friday September 7, 2012. When school began two weeks ago, every freshman at Joliet Township High School was issued a laptop -- a first in school history. | Matt Marton~Sun-Times Media
JOLIET — Andres Grijalva worked on his laptop computer, and a linear equation lighted up in a spectrum of colors as he made his way to the solution. Blue numbers indicated his original work. Green indicated his revisions. Red was feedback from Darcy Newell, his …