College tuition paid for???

My boyfriend and I are considering step parent adoption for his kids if we get married. I know that foster kids and in special adoption cases, children can receive tuition assistance. We reside in TX and I was just wondering if that would apply to children involved in step parent adoption cases? Im pretty sure it doesnt, but i used to babysit some children who were adopted by their grandparents and they will be able to receive tuition assistance...