Tex. Education Code § 30B.106

(a) For purposes of calculating the average daily attendance of students attending a full-time hybrid campus or full-time virtual campus, the commissioner shall use the number of full-time equivalent students enrolled in the full-time hybrid or full-time virtual campus multiplied by the average attendance rate of the school district or open-enrollment charter school that offers the full-time hybrid or full-time virtual campus not including any student enrolled full-time in a full-time hybrid or full-time virtual campus. In the event that a reliable attendance rate cannot be determined under this section, the commissioner shall use the statewide average attendance rate.

(b) The commissioner shall provide proportionate funding to the applicable school district or open-enrollment charter school for a student that alternates attendance between a traditional, in-person campus setting and the full-time hybrid or full-time virtual campus of any single district or school in the same school year.