(CNN) -- When first-grade teacher Waynel Mayes saw that a tornado was approaching her Oklahoma elementary school, she began to move the desks around, told the kids they were playing "worms" who had to stay in their tunnels.
Oklahoma teacher used music to calm kids
Then, she had another idea: She grabbed their musical instruments and asked them to play and sing as loud as they could. They could scream if they were scared, she said, but just don't stop singing.
"All our teachers were so brave," Mayes said, but the kids helped, too. "They were the bravest, they were the heroes because they listened to all the teachers."