Parents were notified Wednesday that a student brought a pocketknife to North Grade Elementary School in Lake Worth.
In a call to parents, the school said the knife was in a backpack and the student showed it to another student.
It was reported to a teacher and the administration.
The school said it met with all involved and "appropriate action has been taken as outlined under the Student Code of Conduct."
The school reminds parents to talk to their children and to report anything suspicious.