You do need to talk to an attorney as soon as possible. I will advise you that public school districts in Texas have sovereign immunity for most acts even if those acts are negligent. The Tort Claims Act provides a very limited waiver of immunity so your claim will have to fall within one of those waivers for you to have a claim. Generally, a Texas school district is only liable for claims arising out of the use of motor vehicles so I am not sure you have a viable claim. Nevertheless, seek legal advice as there may be other remedies or accommodations that can be made for your daughter.
A roundup of the best tips and legal advice.