Regrade areas where water drains toward the building. Make sure flashing around vents and pipes is properly attached. Ventilate areas where moisture accumulates. In addition, get rid of potential nesting sites around the building, such as wood piles or stumps. Trim tree branches away from the building to prevent a possible bridge from wood to structure.
Ants nesting within the school, especially Carpenter ants, require a response decision.
Foraging ants may need to be dealt with if their numbers are excessive, or if they are overly distracting. By and large, however, if it can be determined that ants are not Carpenter ants, and they are not entering the building from outside, these ants constitute a potential annoyance or class lesson, but are not really worrisome pests.