A Palestinian teacher speaks in class at a school in Gaza City on April 2.

Palestinian school children raise their hands during a class in al-Qahera elementary school in Gaza City on April 2. New rules from the Education Ministry of the Islamist Hamas movement ruling the Gaza Strip will bar men from teaching at girls' schools and mandate separate classes for boys and girls from the age of nine.

Palestinian school girls and boys walk in front of a United Nations Relief and Works Agency elementary school in Shati refugee camp in Gaza City, on April 2. Gaza's Hamas-controlled parliament has passed a law requiring separate classes for boys and girls in public and private schools from the fourth grade. Currently, boys and girls are separated in grade seven in public schools, but private schools can set their own rules.

Men peer through the former window of a destroyed school in the village of Budyali, Nangarhar province, Afghanistan, on March 19, 2013. Taliban militants attacked the nearby district headquarters in July 2011, then took refuge in the school. The Afghan National Army requested help from coalition forces, who responded with drones, fighter jets and rockets, leaving the school destroyed, according to village elders.

Ahmed Shah, 12, center, recalls the attack on his village in the yard of a house where he and his family found refuge in the village of Khalis, Nangarhar province, on March 20, 2013.

Boys study in a makeshift school in the village of Budyali, Nangarhar province, on March 19, 2013.

Papers and schoolbooks lie among the debris of a destroyed school in the village of Budyali, Nangarhar province, on March 19, 2013.

Men walk through the debris of the destroyed school in the village of Budyali, Nangarhar province, on March 19, 2013.

Protesters throw a bench from a balcony following an apparent suicide by a college freshman at the Polytechnic University of the Philippines in Manila on March 18.

Chairs and tables are burned by student protesters.

Student protesters throw a chair.

Pilar Pangalinan, 75, holds pictures of her late granddaughter Kristel Tejada during a wake in Manila on March 18.

First grade student Livie Classenn recites the Pledge of Allegiance to start the day at the Walton Rural Life Center Elementary School, in Walton, Kan., Jan. 18. Students at the school do farm chores at the beginning of each school day. The Walton Rural Life Center - a kindergarten through fourth grade charter school in rural Kansas - uses agriculture to teach students about math, science, economics.

Third-grade students Cody Eye and Elizabeth Harder feed the hogs.

First-grade student Destiny Smith prepares hay to feed the cows.

President Obama looks through a magnifying glass while visiting a classroom in Decatur, Ga.

President Obama plays a game in a preschool classroom at an early childhood learning center in Decatur, Ga., on Feb. 14. Obama flew to Georgia to push his plan to ensure high-quality preschool, unveiled during his State of the Union address this week.

President Obama high-fives with a child.

A student writes on the blackboard in a classroom in Gao, Mali, on the first day schools reopened after the French bombing of Islamist targets, on Feb. 4. Schools reopened today in Gao after the town was taken on Jan. 26 by French and Malian forces from Islamists who had been occupying it for the last year.

Students attend a class in Gao on the first day schools reopened, on Feb. 4.

Students work in a classroom in Gao on the first day schools reopened on Feb. 4.

A teacher checks students' chalk boards in a classroom on the first day schools reopened on Feb. 4, in Gao, Mali. The majority of the school's tables and benches were taken by Islamists.

A girl looks up to the sky after hearing the sound of shelling as she sits on a toy pony in the playground of Al-Tawheed school in Aleppo, Syria on Jan. 1.

Children play in the playground of Al-Tawheed school in Aleppo on Jan. 1.

Children play with a toy car in the playground of Al-Tawheed school in Aleppo on Jan. 1.

Children sit on school benches at Al-Tawheed school in Aleppo on Jan. 1.

Children attend a class at Al-Tawheed school in Aleppo on Jan. 1.