Texas belongs to the interstate compact that smooths school moves for military children. It gets your child enrolled promptly even when records have not arrived, keeps differences between states in attendance rules, scheduling, course sequencing, grading, course content and testing from setting your child back, protects their eligibility for programs and for academic, athletic and social activities, and works toward on-time graduation.
Raise the problem with your school district first. If it is not resolved, submit an MIC3 assistance request. You can also call the Texas points of contact at 512-463-9581 or 512-463-1775.
Your military orders showing the move, and whatever school records you have from the previous district.