Tex. Labor Code § 201.069

In this subtitle, "employment" does not include:

(1) service performed in the employ of a school, college, or university by a student who is enrolled and regularly attending classes at the school, college, or university;

(2) service performed by an individual who is enrolled as a student in a full-time program that combines academic instruction with work experience and that is taken for credit at a nonprofit or public educational institution normally maintaining a regular faculty and curriculum and having a regularly organized body of students in attendance at the place where its educational activities are conducted, if the service is an integral part of the program, and the institution has so certified to the employing unit, except:

(A) service performed in a program established for an employer or a group of employers;

(B) service in an apprenticeship training program; or

(C) service performed by a teaching assistant; or

(3) service by a student in the employ of an organized camp if:

(A) the camp:

(i) did not operate for more than seven months in the current calendar year and did not operate for more than seven months in the preceding calendar year; or

(ii) had average gross receipts for any six months in the preceding calendar year that were not more than 33-1/3 percent of its average gross receipts for the other six months in the preceding calendar year; and

(B) the student performed services for the camp for fewer than 13 calendar weeks in the calendar year and the student:

(i) is enrolled as a full-time student at an educational institution; or

(ii) is between academic terms or years and:

(a) the student was enrolled as a full-time student at an educational institution for the preceding academic term or year; and

(b) there is reasonable assurance that the student will be so enrolled for the next academic term or year.