f2e624f2_rful_Vocabulary__Research_Base__0
[1] Each lesson teaches word meanings incrementally and repeatedly. Students apply each new vocabulary word at least seven times, ensuring mastery of new words. [2] Studies show that for students to understand aword’s meaning, they must experience rich, effectiveinstruction around the word (Beck, McKeown & Kucan, 2002; Block 2004). [3] Students retain newly taughtwords because they understand their meaning and have had the requisite number of exposures to the word to insure mastery. [0] 
Multiple Exposures to Words and Meanings
Scholastic Online for Educators | Powerful Vocabulary: Research Base