Books

AR BookFinder and Book Level Index

Programs

Books

AR Bookfinder

Students, teachers, and parents can search for books that provide AR quizzes through the AR
Bookfinder. AR Bookfinder supports more than 200,000 non-fiction and fiction books. You can search
for books under a variety of search criteria, including ATOS Book Level, Lexile Index, Interest Level, Title,
Author, Fiction/Nonfiction, Topic, and Award-winning works.

AR Bookfinder

Characteristics

If you search for a book, you can check the ATOS Book Level, Interest Level, Point, and
types of quizzes available.

Click on a book to see additional information on Word Count,
Fiction/Non-Fiction, and Award History.

With the Advanced Search function, you can search by selecting a specific Interest Level, ATOS Book Level,
Lexile measurements, or by Topics and Subtopics.

The Collections search feature allows you to search through list of book awards and Renaissance’s What Kids
are Reading List for each year.

Using Textbooks Search, you can search for textbooks from
major publishers in American schools.

Book Level Index

In order to create a successful reading habit, it is important to select books that fit student’s reading level and interests. The three indices below are
Renaissance Learning’s representative book indices for effective English reading.

ATOS

Book Level Index,
which combines the average length of a sentence, word length,
vocabulary level, and number of words

Point

Points assigned to the book
by the length and difficulty of the book

Interest level

an index indicating
whether the subject and idea
of a book are appropriate for each age group

ATOS Book Level

ATOS is a measure of readability—in other words, a readability formula designed to guide students to
appropriate-level books. ATOS takes into account the most important predictors of text complexity—
average sentence length, average word length, and word difficulty level.

Interest Level (Age-appropriate Level)

It is an index that indicates whether the subject and idea of the book are appropriate for each age group.
Along with the ATOS index, you can select books by considering the Interest Level and guide students to
enjoy reading with more suitable books.

Interest Level	Grade Appropriateness
LG	Lower Grades – Kinder~G3
MG	Middle Grades – G4~G8
MG+	Middle Grades Plus – G6+
UG	Upper Grades – G9~G12

Point

All books that provide AR quizzes are given points according to the length and difficulty of the book.
Points can be earned according to the correct answer rate of the quiz, and students will be motivated to
continue reading activities. Points can continue to accumulate and be used to manage students’ reading
activities.

Points earned after completing the AR quiz

Points accumulated