The teachers, from 18 provinces, gathered at Freedom Park in the capital, the only sanctioned space for such demonstrations.
Many Cambodians believe they will be cursed by their ancestors if they are unable to pray at a pagoda during Pchum Ben.
The US is still facing a high unemployment rate, 9.1 percent for August.
Cambodia has about five known blocs for petroleum exploration in the Gulf of Thailand, as well as potential resources in Tonle Sap.
George Boden, a campaigner for Global Witness, expresses concerns to VOA Khmer about the future petroleum production in Cambodia.
According to the Australian government, Cambodia loses between $300 million and $500 million per year in revenue lost to corruption.
Sopheak Real loves rice. Now, thanks to some new initiatives in his native Cambodia, the Fresno, California, elementary school teacher can buy rice from his homeland. VOA Khmer's Poch Reasey reports from Long Beach, California.
Two companies are now importing rice from Cambodia: Angkor International, LLC, and the Imperial Rina Group, IRG.
ADB is supporting a $146-million project that would rehabilitate Cambodia’s railways to help connect Asean countries to Kunming, China.
According to the plan, the government will pay almost $500 per metric ton for white rice and $650 for higher quality fragrant rice.
Thaksin said in a lecture held at the Council of Ministers’ building, that Cambodia had shown strong growth compared to the region.
In Cambodia, officials have curtailed dredging and suspended sales as they assess the environmental damage caused by sand mining.