3132 - Open Records Act

I checked on this.  I don't know which exact acts apply to Texas, but
a quick google("open records act academic examinations") implies that
there is an exception:

| test questions, scoring keys and other examination data pertaining to
| the administration of an examination for employment or academic
| examination;

  source: somewhere from New Jersey (with google highlighting)

This isn't comprehensive research, just some evidence.

Red: Yeah, the Open Records Act is awesome if you go to a public
    school.
Green: (enters from right) Man, this calculus test is going to be so
    hard...
Maroon: Let's make the professor give us all the answers before the
    test!  I'll go get the form.