The document discusses academic vocabulary and identifying Tier 2 words for vocabulary instruction. It provides criteria for determining which Tier 2 words are most appropriate to teach, including words that students will see often across texts, will be useful for their own writing, relate to other known words and ideas, are significant to meaning or tone, and cannot be inferred from context. Examples are given of applying these criteria to sample words to decide whether they should be addressed through instruction. The goal of vocabulary instruction is for students to thoroughly understand and be able to use words in a variety of contexts.