Sheltered instruction, also referred to as specially designed academic instruction in English (SDAIE), with a codified framework for implementation known as the sheltered instruction observation protocol (SIOP) model, is an approach for simultaneously promoting language and academic content knowledge development for English‐language learners (ELLs) in K‐12 bilingual and mainstream classrooms taught in English. The aim of sheltered instruction is to make input more comprehensible to ELLs without reducing the academic rigor of the lesson. Suggestions for implementation are included.