Renewed terrorism threats in the country's Muslim south prompted a meeting of worried teachers and parents.
The southernmost provinces near the Malaysian border have a history of insurgency from communist and Muslim separatists.
Teachers' leader Narit Suthiklad led a meeting in Narathiwat to discuss a sudden surge in bomb attacks, allegedly carried out by bandit gangs.
Last week in Yala, police defused a 15-kilogram bomb 10 minutes before it was set to explode. The bomb was planted under a lorry in the garage of a company also targeted by machinegun fire.
A gang of bandits allied to the outlawed Pattani United Liberation Organisation claimed responsibility for the attack.
Last weekend, people escaped injury in a bomb blast at a school in Narathiwat.