Certification is the State of Texas' way of "okaying" you for teaching in public schools. Earning certification involves several steps, including coursework, on-site training & observation, and examinations. Endorsement is a status that can be added to an existing certificate, thereby allowing you to teach in a limited number of more specialized areas (e.g. ESL). If you are interested in earning ESL Endorsement on your existing (or anticipated) Texas Teaching Certificate, you must speak to the staff in the College of Education about taking the ExCET examination.
NEITHER of these – certification or endorsement – are related to the Graduate or Undergraduate Certificates in TESOL offered by the UT Arlington Department of Linguistics and TESOL. Those are more like “minors” that give you background to go out and teach abroad, or to teach adult learners.
The UT Arlington Linguistics Department offers a graduate-level certificate in the TESOL. This is a 19-hour program; all courses taken as part of this program must be taken at the graduate level. Our department’s Undergraduate Certificate in TESOL is available for students who have not yet completed their BA. It is a cluster of 15 hours of undergraduate classes.