"Turkish Flag with Prime Numbers" activity was held on Tuesday, October 26, in the 6th grade students in Mathematics class. Within the scope of the activity, the students grasped to find the prime numbers they had just learned and practiced on this subject. At the end of the event, the students created the Turkish Flag and painted them. We had a flag made up of prime numbers before the 29 October Republic Day. The most beautiful flags were shared in the classroom.