REA's TExES Core Subjects EC-6 (391) Book + Online Gets You Certified and in the Classroom! Go with REA, your trusted partner for success in Texas teacher certification for over 30 years. This all-in-one Book + Online prep pack reflects Texas's TExES Core Subjects EC-6 (391) exam, which launched in 2021. Texas teacher candidates seeking Early Childhood-Grade 6 certification must take this exam. Choose REA for targeted...