Tex. Educ. Code § 25.037

On the timely filing with the agency of notice of a child's transfer and certification by the agency of the transfer, the state available school fund apportionment transfers with the child. For purposes of computing state allotments to school districts under the Foundation School Program, the attendance of the child before the date of transfer is counted by the transfer sending district and the attendance of the child after the date of transfer is counted by the transfer receiving district.