Flags Over TRES! Did you notice a new flag has been added to our flagpole? These colored flags indicate the air quality in our neighborhood and recommended activity levels for outdoor exercise. TRES will introduce the flag program to students to let them know what each color flag means and to bring attention to the need for clean air. Look for a paper flag in your child's Friday folder to color and return to school. The flags will be displayed in the front hallway as part of our participation in the School Flag Program.