Researchers have given limited attention to teacher attitudes toward inclusion of English-language learners (ELLs) in mainstream classrooms. The author explored 4 categories within secondary teacher attitudes toward ELL inclusion: (a) ELL inclusion, (b) coursework modification for ELLS, (c) professional development for working with ELLs, and (d) perceptions of language and language learning. Findings from a survey of 279 subject-area high school teachers indicate a neutral to slightly positive attitude toward ELL inclusion, a somewhat positive attitude toward coursework modification, a neutral attitude toward professional development for working with ELLs, and educator misconceptions regarding how second languages are learned. (Contains 3 tables and 2 notes.)