Education

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An unidentified student is framed by a door at Millard South high school in Omaha, Neb., Friday, Jan. 7, 2011. Classes resumed Friday at the school where a 17-year-old shot two administrators, killing one, before fleeing and committing suicide. At left is Millard Superintendent Keith Lutz. (AP Photo/Nati Harnik)

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A woman wearing a security jacket walks past students as they gathered at the entrance to Millard South high school in Omaha, Neb., early morning Friday, Jan. 7, 2011, before classes resume for the first time since a 17-year-old student shot two administrators, killing one, before fleeing and committing suicide. (AP Photo/ Nati Harnik)

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Students hug at Millard South high school in Omaha, Neb., early Friday, Jan. 7, 2011. Classes resumed Friday after a 17-year-old student shot two administrators, killing one, before fleeing and committing suicide. (AP Photo/Nati Harnik)

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Millard South High School students hold a candle light vigil in front of the school Thursday Jan. 6, 2011, in Omaha, Neb. A student opened fire killing the assistant principal, and wounding the principal on Wednesday. (AP Photo/Dave Weaver)

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Millard South High School students hold a candle light vigil in front of the school Thursday Jan 6, 2011, in Omaha, Neb. A student opened fire killing the assistant principal, and wounding the principal on Wednesday. (AP Photo/Dave Weaver)

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Omaha Mayor Jim Suttle speaks to reporters Thursday, Jan. 6, 2011, on Wednesday's shootings at Millard South High School in the city. (AP Photo/Dave Weaver)

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The U.S. flag flies at half staff Thursday Jan 6, 2011, outside of the Millard Public Schools Administration Center in Omaha, Neb. The 17-year-old gunman who opened fire at his Nebraska high school, killing an assistant principal, had been suspended from class and removed from the building hours earlier for driving on an athletic field, police said Thursday. (AP Photo/Dave Weaver)

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Omaha, Neb., Police Chief Alex Hayes takes questions from the media Thursday, Jan 6, 2011. The 17-year-old gunman who opened fire at his Nebraska high school, killing an assistant principal, had been suspended from class and removed from the building hours earlier for driving on an athletic field, police said Thursday. (AP Photo/Dave Weaver)

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A memorial is arranged in front of Millard South High School, Thursday, Jan. 6, 2011, in Omaha, Neb., after a student shot and killed one administrator and wounded another. (AP Photo/Dave Weaver)

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A medical helicopter lifts off from Millard South High School Wednesday, Jan 5, 2011, in Omaha, Neb. A student shot and wounded two adults causing students to rush into a school kitchen to take cover before his body was found in a car about a mile away. (AP Photo/Dave Weaver)

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The car belonging to Robert Butler Jr. is towed in Omaha, Neb., Wednesday, Jan. 5, 2011, after Butler, a Millard South High School student, shot and wounded the principal and assistant principal at the school. His body was found in his car about a mile away. (AP Photo/Dave Weaver)

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An unidentified student, center, is united with a loved one, in Omaha, Neb., Wednesday, Jan. 5, 2011, outside the Millard South High School after a student shot and wounded two adults, causing students to rush into a school kitchen to take cover before his body was found in a car about a mile away. (AP photo/Dave Weaver)

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A Omaha police officer stands with a rifle as parents wait for students of Millard South high school to be released after a school shooting Wednesday Jan. 5, 2011, in Omaha Neb. Police say 17-year-old Robert Butler Jr. opened fire Wednesday at Millard South High School, wounding the school's principal and vice principal. The vice principal died in hospital hours later. (AP photo/Chris Machian)

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Security forces stand guard outside the Millard South high school in Omaha, Neb., Wednesday, Jan. 5, 2011, where a student opened fire, wounding two adults and causing students to rush into a school kitchen to take cover before his body was found in a car about a mile away. (AP Photo/Nati Harnik)

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Millard South high school students give the V sign as they are let out of the school in Omaha, Neb., Wednesday, Jan. 5, 2011. Police say a 17-year-old who opened fire in the school fatally shot himself after leaving the school. (AP Photo/Dave Weaver)'

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An undated photo shows Millard South high school student Robert Butler Jr. Butler, who shot and wounded two adults, Wednesday, Jan. 5, 2011, at the Millard South high school in Omaha, causing students to rush into a school kitchen to take cover before his body was found in a car about a mile away. The vice principal of the school later died from her injuries. (AP Photo)

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FILE - In this June 3, 2008 file photo, Liberty Valley Elementary School, Danville, Pa., kindergarten student Tianna Swisher attempts to drink from the water fountain at Montour Preserve, near Washingtonville, Pa., during the school's outdoor field trip. Fluoride in drinking water, credited with dramatically cutting cavities and tooth decay, may now be too much of a good thing. It's causing spots on some kids' teeth. A reported increase in the spotting problem is one reason the federal government will announce Friday, Jan. 7, 2011, it plans to lower the recommended limit for fluoride in water supplies, the first such change in nearly 50 years. (AP Photo/Bloomsburg Press Enterprise, Bill Hughes, File)

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Richard Nyankori, in charge of special education in the District, says mainstreaming is a priority, vouchers also are possible. (Rod Lamkey Jr./Special to The Washington Times)

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English teacher Richard Kinslow does not call in sick at Central Falls High School in Central Falls, R.I., but many teachers have done so since being rehired in a second-chance agreement. The entire staff was fired last year in a radical improvement effort. (Associated Press)