Texas Education Code - Section 25.087. Excused Absences
A school district shall excuse a student for temporary absence resulting from health care professionals if that student commences classes or returns to school on the same day of the appointment. A student whose absence is excused under this subsection may not be penalized for that absence and shall be counted as if the student attended school for purposes of calculating the average daily attendance of students in the school district. A student whose absence is excused under this subsection shall be allowed a reasonable time to make up school work missed on those days. If the student satisfactorily completes the school work, the day of absence shall be counted as a day of compulsory attendance.