REA's TExES Bilingual Education Supplemental (164) Test Prep with Online Practice Tests Gets You Certified and in the Classroom! Teacher candidates seeking certification to become bilingual teachers in Texas public schools must take the TExES Bilingual Education Supplemental (164) test. Written by Dr. Luis A. Rosado, director of the Center for Bilingual and ESL Education at the University of Texas at Arlington, this REA test guide provides extensive...