Which is a recommended strategy to support vocabulary development in content-area literacy?

• A. Limit vocabulary focus to a unit only.
• B. Use a single definition per term in a glossary.
• C. Explicit tier 2/3 word instruction with definitions and examples; word-learning routines; contextual and pictorial supports.
• D. Avoid using visuals or context to explain terms.

Answer: (C)

Explicit, ongoing vocabulary instruction across content areas helps students understand and use important terms in science, social studies, math, and other disciplines. The best approach is to teach key terms explicitly, especially Tier 2 and Tier 3 words, with clear, student-friendly definitions and plenty of concrete examples. Pair this with word-learning routines that foster independent growth—using word parts, affixes, and strategies for deciphering meaning—along with opportunities to encounter and use the words in speaking and writing. Providing contextual clues and visual supports, such as diagrams, pictures, and semantic maps, helps students attach meaning to terms and remember them across different texts and situations. This combination builds durable understanding and supports transfer to new content. Limiting vocabulary work to a single unit, offering only one glossary definition per term, or avoiding visuals and context all hinder students’ ability to grasp and apply terms in real reading and discourse.