Cambodia's killing fields: the 'story' becomes history
Sentencing of two former Khmer Rouge leaders opens new chapter in schools' lessons on a genocide once whitewashed from textbooks
Pointing at photographs of two former Khmer Rouge leaders a day after they were sentenced to life in jail, history teacher Ung Ratha asks his students whether justice was served.
One volunteers the punishment was too lenient, as others in the class try to grasp how Cambodia's "Killing Fields" era, once whitewashed from textbooks, left up to two million people dead.
"Some students do not believe it happened because their parents were born after the regime. They feel that the teachers are making it up," said Ratha, 43.
But having lived through the Khmer Rouge's brutal 1975-1979 rule, he brings a first-hand account to lessons which only became compulsory for high school students three years ago.
The students flinch when Ratha shows them skulls from execution sites, before turning to the first convictions of top ex-leaders to bring this gruesome period of history up to date.
On Thursday, Cambodia's UN-backed court found "Brother No 2" Nuon Chea, 88, and ex-head of state Khieu Samphan, 83, guilty of crimes against humanity, sentencing them to life in prison.
"The verdicts taught me more about the leaders of the Khmer Rouge, the torture and other things they did," said Khun Monalisa, 18, a final-year student at Beltei International School in Phnom Penh.
She has been following the case more closely than many young Cambodians - more than half of the population was born after the regime fell - as, until recently, schools have taught little about the period.
According to the Documentation Centre of Cambodia, the government removed all reference to the regime from school curriculums between 1993 and 2002 in an attempt at reconciliation with former cadres.
It took years of lobbying before a textbook on the period was eventually allowed in Cambodian schools in 2009, paving the way for a compulsory curriculum a few years later.
The Khmer Rouge forced more than two million people out of Cambodian cities and into rural work camps during their rule, wiping out nearly a quarter of the population through executions, starvation or overwork.
Teachers were among the prime targets of the communist regime which systematically killed former state officials and intellectuals deemed a threat to its quest for an agrarian utopia.
Watch: Khmer Rouge verdicts bring history alive for Cambodian students
Incorporating this history into a nation still traumatised has been a massive challenge.
"Some of the teachers were Khmer Rouge themselves, so they would insist on a different version [of history]. Some were victims, and they would insist on more stories of survivors," said the documentation centre's director Youk Chhang, recalling at least two teachers who quit.
As part of the moral reparations for victims awarded by the court last week, schools will now incorporate a new chapter in their teaching about the regime, including the forced migrations.
"It's no longer a story, it's history," Chhang said of the educational impact of the verdict, adding though that it triggered more questions than answers.
"The court was looking at individual responsibility, not the whole history of the Khmer Rouge ... [The judgment] should make more students interested to find out more."
A 2010 study by the University of California, Berkeley, showed a third of Cambodians who did not live under the regime had no knowledge of the tribunal.
Back in the history class, Ratha tells his students about the time he had to roast lizards and pluck worms out of cow dung to keep hunger at bay.
It's a difficult period for this new generation to relate to - but unlike earlier students they have a chance to learn about the past.