We really don’t talk enough about vocabulary on this blog, do we?

All joking aside, conversations about vocabulary instruction are important. Without proper vocabulary study, students may have a hard time developing the rest of their language arts skills, including reading and writing. Having strong vocabulary knowledge will help outside the English classroom, too, as students will undoubtedly encounter unfamiliar words in other subject areas.

To prepare students for success in school and beyond, state standards across the nation often require students to learn domain-specific words as part of their requirements for effective instruction.

So, what exactly are domain-specific (or Tier 3) words?

Put simply, domain-specific words, also known as Tier 3 words, are technical or jargon words important to a particular subject. Students don’t typically hear or see these kinds of words in everyday life, but they’re essential for understanding what’s happening in class. For instance, chemistry and element both fall under science-related vocabulary, while allusion and verse relate closely to English language arts (naturally, our favorite subject area).

Teaching domain-specific vocabulary is crucial because students can’t fully engage with a lesson if they don’t understand the language. Imagine asking a student to find examples of symbolism in a story they’ve read, but they don’t know what symbolism means; or asking them to explain how cells work without knowing nucleus or mitochondria. Learning becomes much harder without word knowledge.

The good news is that domain-specific words are often easier to teach than general vocabulary because they’re usually introduced in the context of a relevant lesson or unit. Students encounter Tier 3 words repeatedly as they read, write, discuss, and study the material, giving them plenty of opportunities to reinforce their understanding. 

Where do you find domain-specific words?

You probably don’t want to scour a bunch of huge textbooks to find quality domain-specific words for your students, so here are a few suggestions:

1. Discuss your vocabulary needs with other professionals.

Your fellow teachers should be glad to give you potential vocabulary words from their areas of expertise (especially because your teaching these vocabulary words will help their students, too). If you ask nicely, they may also direct you to nonfiction texts you can use in your classroom. Everyone wins!

Don’t be afraid to ask your students for vocabulary word inspiration, too. Chances are high that they’ve come across domain-specific words in other classes. Analyzing uncertain terms from other subjects, such as history or math, will help students strengthen their vocabulary skills and reinforce their knowledge in other school subjects.

2. Assign rigorous nonfiction to your students.

Nonfiction texts are the perfect place to encounter domain-specific words, especially since those words will be used in the appropriate context. Have students attempt to define unfamiliar vocabulary words in context before giving them hints or allowing them to use a dictionary. Strategies like root study, comparing and contrasting, logical analysis, and illustration will come in handy during these types of exercises.

Finding nonfiction texts for your lessons is easy. Web articles, journals, and encyclopedias are great resources for introducing domain-specific words to your students. For teachers pressed for time, ready-made compilations such as Reading Informational Texts and Essential American Documents and Speeches contain nonfiction pieces, including exemplar texts, that meet the level of difficulty required for deep analysis.

3. Use vocabulary resources that have sections on domain-specific words.

Our trusted Vocabulary Power Plus series offers direct practice on hundreds of high-impact words while helping you cut down on instruction time. Each chapter introduces new words through engaging exercises and repeated practice, encouraging students to use new vocabulary in meaningful contexts rather than simply memorizing definitions. 

The Vocabulary for the College Bound series includes comprehensive lessons that focus on academic and domain-specific words from many subjects, including science, math, and social studies. In each level of the series, each vocabulary word is used several times in different contexts, giving students repeated exposure that helps reinforce understanding and improve long-term retention.

No matter which resources you use, the goal is the same: help students build the vocabulary they need to understand what they’re reading and communicate their ideas with confidence. When students become comfortable with domain-specific words, they’re better equipped to tackle challenging texts, participate in meaningful discussions, and write with greater precision.

The best part is that teaching these words doesn’t have to feel like an extra item on your to-do list. Every novel, poem, nonfiction article, or classroom discussion presents an opportunity to introduce and reinforce vocabulary in context. Those small moments certainly add up, helping students build the word knowledge they’ll rely on not only in English language arts, but throughout their academic careers.

Resources in this article: