The Brief Students at Dallas ISD schools returned to class on Tuesday, the first day of the 2026-27 school year for the nearly 130,000 students in the district. Dallas ISD Superintendent Dr. Stephanie Elizalde greeted students at Hexter Elementary School, which opened up a new school building earlier this year. It's that time of year again, with students at Dallas ISD schools returning to class for the 2026-27 school year. Dallas ISD first day of classToday is the first day of school for nearly 130,000 students in Dallas ISD, and it comes with notable changes across the district. Last year, Dallas ISD saw a decline in enrollment after seeing a rise the previous school year.