MAY 27-JUNE 2, 2007: HIT LISTS AND SCHOOL VIOLENCE

In the wake of the shootings at Virginia Tech, schools are taking a closer look at student writing, especially so-called "hit lists," in which students list the classmates they'd kill if they had the chance. Our first lesson plan considers whether these hit list writers are dangerous and how administrators should respond. ALSO: We ask whether laptops in schools help improve learning, and we delve into the secrets of "Dark Energy," which makes up two-thirds of our universe.

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Web links for this week's guide

HIT LISTS AND SCHOOL VIOLENCE

National Crime Prevention Council

Safe Schools, Healthy Students

National Youth Violence Prevention Center

Kidshealth.org

LAPTOPS IN SCHOOL

Edutopia

Apple.com

DARK ENERGY

NASA

NASA: Beyond Einstein

Space.com