http://dan.hersam.com/2009/02/11/what-grade-level-do-you-write-at/
What Grade Level Do You Write At?
The Flesch Kincaid Readability Test measures two aspects of a document – the reading ease and grade level. Reading ease is measured from 0 to 100, 0 being incomprehensible and 100 being easily understandable by an average 11 year-old student. The reading level represents the number of years of education needed to understand the text....