Which statement about Tier 2/3 words is most accurate?

• A. Tier 2/3 words are unnecessary for understanding academic texts.
• B. Tier 2/3 words are everyday words that require no explicit instruction.
• C. Tier 2/3 words can be learned mainly through incidental exposure in reading.
• D. Tier 2/3 words are high-utility academic terms that benefit from explicit instruction and multiple exposures.

Answer: (D)

Tier 2 and Tier 3 vocabulary includes high-utility academic terms and domain-specific terms that drive understanding across texts and subjects. These words aren’t the everyday vocabulary students hear all the time, and they often don’t become known through incidental reading alone. Because they carry precise meanings and are frequently encountered in academic work, they benefit most from explicit instruction and multiple exposures in varied contexts. Teaching these words directly—explaining meanings, usages, and how they connect to concepts students already know—helps students build durable understanding and fluency.

That’s why this statement is the best: Tier 2/3 words are high-utility academic terms that benefit from explicit instruction and multiple exposures. The other options misrepresent these words by suggesting they’re unnecessary, are everyday vocabulary requiring no instruction, or are learned mainly through incidental exposure, which doesn’t align with how these terms function in academic literacy.