Can a unaccompanied minor travel alone withiout an State I.D?

we have a school I.D but do not have a state i.d yet and we do want to fly in the near future. we will be flying SOUTHWEST AIRLINES in DALLAS LOVE FIELD airport, i have called all their numbers and they do not give me the information i need. IF you have absolute accurate knowledge and are 100 percent sure of your answer please answer my question, please and thanks for your time.