Is there a way to drop out of high school in texas at age 15 legaly?

I've been seeing mixed answers and I am kind of confused about the entire subject. The Texas Education Agency website does not state any definite guidelines that I can find. I seen every question have somebody try to encourage them not to but its just getting old if they don't listen to school who is going to listen to some random person on the internet. Also does anybody know all the requirements to work at Nomac drilling and their on the job rules?