Lance average: refers to the index of Lance test, as one of the indicators of American children's education.

Lance index is calculated by decomposing the sentence length, lexical frequency and other characteristics of the text through semantic difficulty and syntactic difficulty.

Lance grading reading evaluation system provides early reading index for books with Lance index of 650L and below, thus providing more accurate matching.

Lance test includes two evaluation indicators:

1, lance reading evaluation

That is, the reading ability index obtained by students after doing the blue thinking test includes readers with different ability levels from 0L to 2000L, and small readers who just started reading independently below 0L.

2. Lance's reading evaluation

That is, according to the vocabulary and sentence complexity of reading materials, a blue index of books is made comprehensively. At present, there are more than 1 100 million books and websites related to lance books. If you want to know what the Lance index of a book is, you can look it up directly on Lexile website.