Experience Reading A-Z: Leveled Books for Every Reader

Part 1 - How Reading A-Z Fiction and Nonfiction Books Are Leveled

Reading A-Z is famous with educators because we offer more than 2,400 books at 29 levels of reading difficulty. Our extensive collection makes it easy to put developmentally appropriate content into each student's hands.

With Reading A-Z you also get thousands of corresponding resources to enhance instruction and strengthen students' reading skills, including a lesson plan, comprehension quiz, and practice materials that accompany each of leveled book! Let's take a quick look at how our best-in-class leveling system works.

Our Leveling System


At Learning A-Z, our proprietary leveling system was developed over 10 years with input from teachers and instructional experts. Thousands of books were evaluated to create 29 developmentally appropriate levels. Today we also offer a Spanish leveling system, which carefully analyzes text based on Spanish language structure, vocabulary, and syntax.

Learn More:

English     Spanish

The Text Levels

Our leveled texts are grouped into 4 stages of reading development:

Text Levels

The Leveling Measures

Each and every one of our leveled texts is specifically designed and carefully constructed to fulfill appropriate qualitative and quantitative measures.

Qualitative measures ensure:

  • Predictability of text
  • Text structure and organization
  • Illustration support
  • Infographics
  • Knowledge demands

Quantitative measures ensure:

  • Total word count
  • Number of different words
  • Number of high- and low-frequency words
  • Sentence length
  • Sentence complexity

The Leveling Process

Every Reading A-Z text undergoes a precise 5-step review to ensure accurate and reliable leveling.

The Leveling Process

Assessing Students’ Levels

Reading A-Z provides a 3-part assessment process to help you place students in their instructionally appropriate levels.

Student Levels

Using Leveled Books

Reading A-Z Resources

Reading A-Z offers a number of leveled books and texts to differentiate instruction and keep students engaged:

Standards & Correlations

Reading A-Z resources are aligned with all major national and state standards, core reading programs, and NWEA RIT ranges. We also make it easy to find level-appropriate content by providing correlations to other popular leveling systems. Check out the Level Correlation Chart!

Future Flowers leveled book example

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