CASTLE HILLS, Texas While teachers, students and parents across the city gear up for the first day of school, classes at one North East ISD school are already underway. For students at Castle Hills Elementary School, a year-round school, the first day of class was on July 21. The hallways have been empty, and all 470 students enrolled at Castle Hills Elementary have been learning virtually. Elisabeth Myers, a third-grade teacher at Castle Hills Elementary School, says starting the school year with a concrete plan and schedule has been helpful. "But I definitely think from the beginning of virtual learning to now, we have come a long way."