Explicit Vocabulary Instruction

Central to comprehension is vocabulary knowledge. To understand a text (oral or written) students must have adequate knowledge of the words within it.

All children begin to develop their vocabulary starting at birth. However, students arrive at school with varying levels of language proficiency due to a multitude of factors.1 Vocabulary can be a determinant of later comprehension.2 Thus, it is important that practitioners provide explicit vocabulary instruction to support all students’ development of language.

Although students can learn vocabulary incidentally (through sheer exposure), students learn more words when teachers explicitly teach them.3 Explicit vocabulary instruction generally entails the intentional introduction of select words using student-friendly definitions, repeated meaningful exposures in varied contexts to target vocabulary, and instruction to support ‘solving’ unknown words such as the use of morphological elements to determine the meaning of a word.4

Vocabulary words can be categorized into three tiers:

  • (Tier 1) Basic Words (ex: book, play, cat)
  • (Tier 2) Domain-General Academic Words (frustrated, analyze, predict)
  • (Tier 3) Domain Specific Words (stethoscope, photosynthesis, isotope)

While some students, especially those whose first language is not English, may need explicit support with Tier 1 words, practitioners should focus on teaching Tier 2 and 3 words.5 Teaching words across content through the use of text-sets and/or content-rich ELA instruction can help students make connections across topics and words.

1 Cabell, S. Q., Neuman, S. B., Terry, N. P., Dickinson, D. K., Rowe, M. L., Romeo, R. R., & Leech, K. A. (2023). Early Environmental Influences on Language. In Handbook on the science of early literacy (pp. 23–25). essay, The Guilford Press.

2 Pearson, P. D., Palincsar, A. S., Biancarosa, G., & Berman, A. I. (Eds.). (2020). Reaping the Rewards of the Reading for Understanding Initiative. Washington, DC: National Academy of Education. p. 49

3 Zucker, T. A., Cabell, S. Q., & Pico, D. L. (2021). Going nuts for words: Recommendations for teaching young students academic vocabulary. The Reading Teacher, 74(5), 581-594.

4 Kamil, M. L., Borman, G. D., Dole, J., Kral, C. C., Salinger, T., & Torgesen, J. (2008). Improving adolescent literacy: Effective classroom and intervention practices (NCEE 2008-4027). Washington, DC: U.S. Department of Education, Institute of Education Sciences, National Center for Education Evaluation and Regional Assistance. Retrieved from https://ies.ed.gov/ncee/wwc/PracticeGuide/8

5 Zucker, T. A., Cabell, S. Q., & Pico, D. L. (2021). Going nuts for words: Recommendations for teaching young students academic vocabulary. The Reading Teacher, 74(5), 581-594.

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