They crouched in the fetal position and used books to protect their heads, according to Lowe's husband.
Among the kids she was watching was their son.
"She sort of got over my son, got over the other children, just sort of was trying to shield anyone she could," Chad Lowe told CNN.
"A cinder block wall actually fell on her back, and she kind of lifted herself up," he said.
After the storm passed, another teacher came to help the kids get out from under the wall and help Cindy Lowe, too.
Lowe suffered a concussion and has a bad sprain on her ankle and lots of bruises, her husband said, but is expected to be OK.
Their son and the other children all survived.
"His teacher saved his life," a mother gushed to CNN affiliate KFOR. "I have no doubt that God and his teacher, I mean, they lifted a wall off of these kids."