Beck, McKeown, and Kucan (2002) present a useful
framework for classifying vocabulary and making
instructional determinations regarding which words to
teach and how to effectively teach them. According to
this model, vocabulary within a given reading selection
can be grouped into three tiers with Tier 2 words being
the most productive for explicit, in-depth instruction.
Tier 1 words are the commonly-occurring, basic words
of English; these are lexical items that native speakers
of a language easily recognize, such as map, uncle, tall,
sing, and dog. Tier 2 words are academic vocabulary
and other lexical items which appear frequently across
a variety of domains. Words such as coincidence,
industrious, and investigate fall into this category. Tier
2 words are typically essential for understanding the
meaning of a text. Finally, Tier 3 words are lowfrequency
words such as amoeba, isotope, or lathe,
which are often discipline-specific. A more detailed
overview of the three tiers of words, with specific
commentary regarding the language of second language
learners (Calderon, 2007) is provided below
Beck, McKeown, and Kucan (2002) present a usefulframework for classifying vocabulary and makinginstructional determinations regarding which words toteach and how to effectively teach them. According tothis model, vocabulary within a given reading selectioncan be grouped into three tiers with Tier 2 words beingthe most productive for explicit, in-depth instruction.Tier 1 words are the commonly-occurring, basic wordsof English; these are lexical items that native speakersof a language easily recognize, such as map, uncle, tall,sing, and dog. Tier 2 words are academic vocabularyand other lexical items which appear frequently acrossa variety of domains. Words such as coincidence,industrious, and investigate fall into this category. Tier2 words are typically essential for understanding themeaning of a text. Finally, Tier 3 words are lowfrequencywords such as amoeba, isotope, or lathe,which are often discipline-specific. A more detailedoverview of the three tiers of words, with specificcommentary regarding the language of second languagelearners (Calderon, 2007) is provided below
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