We all know the importance of being intentional in addressing vocabulary in our classrooms. Part of this intentional process is selecting the appropriate words to specifically teach. Some words are more important to learn than others. But how do we decide?
Fortunately, there is some guidance for us as we make these decisions. Archer (2003) suggests we select words that:
- Are unknown to students,
- Are important to understanding the text, and
- Are likely to be encountered in the future
Beck, McKeown, & Kucan (2002) have created a three tier model to help us think about which words to teach. These three tiers do not coincide with the RTI three tier model that we’ve been discussing with our teachers, so don’t confuse the two.
Tier One words are basic words that are frequently encountered in life (i.e. clock, bed, radio, come, see). Most students have the concept of these words and don’t need any specific instruction. If a student is unfamiliar with a word in this tier, it is usually sufficient to just provide the definition or an example rather than explicitly teaching the word. Not much time is spent in teaching Tier One words.
Tier Two words are also known as the “mortar words.” These are the words that are high frequency academic words found across a variety of content areas and knowledge domains (i.e. fortunate, absurd, facilitate). Tier Two words should receive instructional emphasis. Language Arts teachers should include many Tier Two academic words in their instruction. Language Arts teachers should not necessarily rely on the words chosen by the reading textbook publisher as the words with the most utility for students. Many of the vocabulary words suggested in a reading textbook are rare words that can be expected to occur once or fewer times in a million words of school texts (Hiebert as cited in Lehr, Osborn, & Hiebert, 2004).
Tier Three words are low frequency words that are usually specific to a particular content area or knowledge domain (i.e. tundra, isotope, lathe, lava). These words don’t generalize well to other content areas. These are the “bricks” held together with “mortar” of the Tier Two, or academic, words. Although content area teachers will spend more of their time teaching Tier Three words, they should also include some Tier Two words that generalize across subject areas.
Tier Three words are often easier to identify than Tier Two words. Textbook publishers identify many of the content specific vocabulary (Tier Three) necessary for students to successfully comprehend the material. Selecting Tier Two words is not as clear cut. The suggested vocabulary in most reading textbooks is not always the best resource. A better resource for finding high frequency academic words is Coxhead’s Academic Word List. It consists of 570 word families which occur frequently over a wide range of academic texts. Teachers should use Coxhead’s list to begin dividing the instruction of these academic words across subject areas and grade levels.
Don’t leave vocabulary learning only to chance. Teach the important words that matter today AND tomorrow. Teach the words that drive comprehension of the key big ideas and provide an academic toolkit for long term academic proficiency (Feldman, 2009).
References
Archer, A. (2003). Dr. Anita Archer: Vocabulary development. Retrieved March 19, 2009 from http://www.fcoe.net/ela/pdf/Vocabulary/Anita%20Archer031.pdf
Feldman, K. (2009). “Response to intervention and older struggling readers: Special education reform as part of meaningful school improvement.” Educational Service Units Professional Development Organization. Kearney, NE. 18 Feb. 2009.
Lehr, F., Osborn, J. and Hiebert, E. (2004). Research-based practices in early reading series: A focus on vocabulary. Retrieved March 19, 2009 from http://www.prel.org/products/re_/ES0419bw.pdf