Pass your TEXES English as a Second Language Supplemental (154) certification exam with this comprehensive practice test featuring 350 real exam-style questions and verified answers with detailed rationales. Updated for the 2026 test cycle, this study guide covers Domain I: Language Concepts & Acquisition (phonology, morphology, syntax, BICS/CALP, Krashen's Monitor Model, Cummins' Iceberg Analogy), Domain II: ESL Instruction & Assessment (sheltered instruction, SIOP, differentiated instruc...