A sign on the door welcomes students to teacher Olivia Mendez' second grade class at Shands Elementary on Thursday, Sept. 22, 2016, in Mesquite, Texas.
A sign on the door welcomes students to teacher Olivia Mendez' second grade class at Shands Elementary on Thursday, Sept. 22, 2016, in Mesquite, Texas. Smiley N. Pool AP
A sign on the door welcomes students to teacher Olivia Mendez' second grade class at Shands Elementary on Thursday, Sept. 22, 2016, in Mesquite, Texas. Smiley N. Pool AP