Citronella ants are about one-eighth inch and brown. They do not live inside, but will frequently forage inside in search of sugary food. They are less of a pest than a distraction, and the best method of keeping them out of buildings is sanitation. If there is sugar available, there will be Citronella ants in the school. The first step to control ants is sanitation.
Ants usually enter buildings in search of food and water.
Do not store food in desks or lockers. Clean up all spilled food and liquids immediately, and inform custodial staff when there is an activity involving food in a classroom so that special attention may be focused on the sanitation of that room soon after the activity is over. Repair leaky faucets and pipes, and empty water containers that stand overnight. Keep all stored food in sealed containers. If ants are entering from outside, try to determine where they are entering and seal the opening.