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Sample worksheet and enlarged notes to Instructors and Assistants from before 2007, (c) Kumon North America. The most up-to-date worksheets can be viewed at their website, www.kumon.com, or at one of their Centers. The proofreaders' marks represent a debate as to 1) whether the level of the difficulty of the sentences was appropriate at that level; and 2) whether it would be most intuitive to introduce the vocabulary by familiarity based on the Peabody scale of Expressive and Receptive language, or by ease of pronunciation based on grammatical structure.
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