Doug Erickson:

Public schools in Dane County poured nearly $3 million into security upgrades over the summer, continuing a trend that began nearly 15 years ago with a school shooting in Columbine, Colo.
Almost all school buildings in the county will have secure entrances when classes begin this week, even in the small, rural districts of Belleville and Wisconsin Heights. All outside doors in both districts will be locked after the start of the school day, a first for both districts but a standard precaution now across much of the county.
Several districts, including Sun Prairie, added a layer of security beyond an intercom system, spending hundreds of thousands of dollars to reconfigure entrances so that visitors walk directly into an office or a locked vestibule before being let into any other part of the school. At two schools in

Related: Police calls near Madison High Schools: 1996-2006.