The kindergarten kids got down on the floor as the shots were fired. Their teacher kept them singing. YouTube hide caption toggle caption YouTube The Two-Way VIDEO: Brave Teacher In Mexico Has Kindergartners Sing During Shootout May 31, 2011 Martha Rivera Alanis and her students had practiced for what to do in case of gunfire outside their school. And as she got her little people down on the floor, Rivera kept keep them from getting too scared by singing.