Education

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Firefighters salute as a hearse passes for the funeral procession to the burial of 7-year-old Sandy Hook Elementary School shooting victim Daniel Gerard Barden, Wednesday, Dec. 19, 2012, in Newtown, Conn. Barden was killed when Adam Lanza walked into Sandy Hook Elementary School in Newtown, Conn., Dec. 14, and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/David Goldman)

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This Monday, Dec. 17, 2012, photo shows the sign in front of the Harrold Independent School District in Harrold, Texas. The K-12 school has a policy allowing teachers and other school employees to carry concealed weapons, a controversial policy that's now being considered in at least five other states in the wake of last week's deadly elementary school shooting in Newtown, Conn. (AP Photo/Angela K. Brown)

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Walter Witschey is a Maya expert and professor of anthropology and science education at Longwood University in Farmville, Va. (Provided by Andrea Dailey)

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A van with a sign reading "carrying school children", center left, drives behind a police vehicle through a main road in the Sandy Hook village of Newtown, Conn., as the strong media presence is felt in the aftermath of the elementary school shooting that shocked the small, quiet town, Wednesday, Dec. 19, 2012. News about the shooting spread quickly across the world, prompting media outlets to set camp in the small town. The gunman, Adam Lanza, walked into Sandy Hook Elementary School in Newtown, Conn., Dec. 14, and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/Julio Cortez)

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President Barack Obama pauses during a speech at an interfaith vigil for the victims of the Sandy Hook Elementary School shooting on Sunday, Dec. 16, 2012 at Newtown High School in Newtown, Conn. A gunman walked into Sandy Hook Elementary School Friday and opened fire, killing 26 people, including 20 children. (AP Photo/ Evan Vucci)

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The funeral procession for James Mattioli, 6, who died in the Sandy Hook Elementary School shootings, approaches the St. John's Cemetery Tuesday, Dec. 18, 2012, in Darien, Conn. A gunman walked into Sandy Hook Elementary School in Newtown, Dec. 14, and opened fire, killing 26 people, including 20 children. Tuesday, Dec. 18, 2012. (AP Photo/Craig Ruttle)

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A woman is comforted by a police officer at the entrance of Head O'Meadow School, Tuesday, Dec. 18, 2012, in Newtown, Conn. Buses ferrying students to schools were festooned with large green and white ribbons on the front grills, the colors of Sandy Hook. At Newtown High School, students in sweatshirts and jackets, many wearing headphones, betrayed mixed emotions. Adam Lanza walked into Sandy Hook Elementary School in Newtown, Friday and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/David Goldman)

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Two teddy bears and a message of remembrance sit outside St. Roses Cemetery before a funeral procession is scheduled to arrive for 6-year-old Sandy Hook Elementary School shooting victim Jessica Rekos, Tuesday, Dec. 18, 2012, in Newtown, Conn. Adam Lanza walked into Sandy Hook Elementary School in Newtown, on Dec. 14, and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/David Goldman)

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A young student is walked into Hawley School, Tuesday, Dec. 18, 2012, in Newtown, Conn. Classes resume Tuesday for Newtown schools except those at Sandy Hook. Buses ferrying students to schools were festooned with large green and white ribbons on the front grills, the colors of Sandy Hook. At Newtown High School, students in sweatshirts and jackets, many wearing headphones, betrayed mixed emotions. Adam Lanza walked into Sandy Hook Elementary School in Newtown, Friday and opened fire, killing 26 people, including 20 children, before killing himself.(AP Photo/Jason DeCrow)

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A school bus rolls towards a memorial for victims of the school shooting in Newtown, Conn., Tuesday, Dec. 18, 2012. Classes resume Tuesday for Newtown schools except those at Sandy Hook. Buses ferrying students to schools were festooned with large green and white ribbons on the front grills, the colors of Sandy Hook. At Newtown High School, students in sweatshirts and jackets, many wearing headphones, betrayed mixed emotions. Adam Lanza walked into Sandy Hook Elementary School in Newtown, Friday and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/Charles Krupa)

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A police officer inspects a vehicle arriving at St. Rose of Lima Roman Catholic Church before funeral services for James Mattioli, a boy killed in an elementary school shooting, Tuesday, Dec. 18, 2012, in Newtown, Conn. Mattioli, 6, was killed when Adam Lanza walked into Sandy Hook Elementary School in Newtown, Conn., Dec. 14, and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/Julio Cortez)

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Easton police officer J. Sollazzo greets a returning student as he is walked into Hawley School, Tuesday, Dec. 18, 2012, in Newtown, Conn. Classes resume Tuesday for Newtown schools except those at Sandy Hook. Buses ferrying students to schools were festooned with large green and white ribbons on the front grills, the colors of Sandy Hook. At Newtown High School, students in sweatshirts and jackets, many wearing headphones, betrayed mixed emotions. Adam Lanza walked into Sandy Hook Elementary School in Newtown, Friday and opened fire, killing 26 people, including 20 children, before killing himself.(AP Photo/Jason DeCrow)

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A young girl waves as her school bus pulls into Hawley School, Tuesday, Dec. 18, 2012, in Newtown, Conn. Classes resume Tuesday for Newtown schools except those at Sandy Hook. Buses ferrying students to schools were festooned with large green and white ribbons on the front grills, the colors of Sandy Hook. At Newtown High School, students in sweatshirts and jackets, many wearing headphones, betrayed mixed emotions. Adam Lanza walked into Sandy Hook Elementary School in Newtown, Friday and opened fire, killing 26 people, including 20 children, before killing himself.(AP Photo/Jason DeCrow)

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Robert Soltis, of Newtown, Conn., pauses after making the sign of the cross at a memorial to school shooting victims in Newtown, Tuesday, Dec. 18, 2012. Adam Lanza walked into Sandy Hook Elementary School in Newtown, Dec. 14, and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/Charles Krupa)