Less than 24 hours before the doors open for summer school, the Dallas school district is still grappling with a teacher shortage for summer school.
The Dallas Independent School District and a teachers group both acknowledge a critical need for more summer school teachers.
About 6,000 students will show up Tuesday to start summer school.
"We've never had a shortage for summer school, never -- and I've been in DISD for about 12 years," said Angela Davis, president of the National Education Association, a teachers group.
Davis said the district's call for summer school teachers is falling on deaf ears because of Superintendent Mike Miles' heavy-handed management style.
"During the regular school year, the teachers were so stressed out that they just can't do summer school," she said.
DISD teachers spent the regular school year under constant scrutiny and with random evaluations and don't want to spend the summer the same way, Davis said.
Last week, district spokesman Jon Dahlander told NBC 5 that the district may adjust class sizes.
"We had planned to have class sizes at about 16 to 18:1," he said. It may be a little bit more than that, but we'll just have to see when Tuesday rolls around."
One middle school principal told NBC 5 on Monday that she was at least five teachers short for summer school and has no idea what Tuesday will hold.
District leaders said they are not at the point of closing any buildings scheduled to open for summer school but there may be a need to re-evaluate summer plans after Tuesday.
NBC 5's Randy McIlwain contributed to this report.