After a 14-year-old boy killed eight people and injured 22 others at a school in Thailand's Nonthaburi province in August, concerns have been growing over the increase in school shootings in South East Asia. Police say they hope the drill will help prepare students.
President Abelardo de la Espriella has lifted a decade-long suspension on permits to carry legal firearms.
Inspectors say the firearms licensing system was not fit for purpose.
New South Wales, where the attack took place, will offer gun owners cash to give up their firearms.
Eight people were killed when a 14-year-old opened fire at his home and school before shooting himself dead.
The student says she feared never seeing her mother again after the attack killed five teachers.
The 78-year-old is charged with a dozen offences. Police also said they found C$300,000 at his home.
The court sided with gun owners who argued the limit on firearms on publicly accessible private property, like restaurants or shopping malls, violates the Second Amendment.
Justice minister Naomi Long ended a consultation seeking views on plans to increase the cost of a gun license on Wednesday.
