Actionable insights to support early learners

In the early grades, students develop the reading and math skills that form the foundation for their future learning. Star CBM allows you to accurately assess students’ development so that you can better target instruction and intervention to each learner’s specific needs.


1:1 administration gives you a first-hand understanding of your students’ learning gaps and instructional needs.


In-depth data helps you identify patterns of errors so you can leverage students’ strengths and identify opportunities for growth.


Star CBM assesses the building blocks of reading and math that are crucial for developmental growth and set the stage for future achievement.


Multiple forms are provided for each measure, so you can administer Star CBM as often as weekly to track students’ development.

Now available

Star CBM Lectura for grades K–6. Assessments that truly reflect students’ literacy development in Spanish.

Streamlined administration, comprehensive reporting

Teachers administer 1:1 to students online, remotely or in print to get an in-depth understanding of student development.

Star CBM supports digital and paper administration , in person and remote delivery, with clear instructions for easy administration.

Item level scoring and clear reports give you actionable insights and appropriate next steps.

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Meet Star CBM

Learn how Star CBM promotes students’ development in reading and mathematics with curriculum-based measures.


Track students’ developmental growth

Star CBM provides a progression of measures in both reading and mathematics that helps you track students’ progress toward third-grade proficiency.

Star CBM Reading begins by assessing students’ understanding of letters and their sounds, moves on to basic phonological awareness and early decoding, and progresses to passage reading.

Star CBM Math demonstrates students’ developing math competency, including recognizing numerals and their value, as well as learning basic facts in addition, subtraction, and multiplication.

Measures for grades K-6

Boy with headphones
  • Letter Naming
  • Letter Sounds
  • Phoneme Segmentation
  • Receptive Nonsense Words
  • Expressive Nonsense Words
  • Passage Oral Reading
  • Sight & High Frequency Words (K-3)
  • Encoding (K-3)

Use in dyslexia screening

girl with headphones

Along with measures of reading achievement, Star CBM Reading includes assessment of Rapid Automatic Naming (RAN), which many states and professionals require as part of universal screening for dyslexia for all students in kindergarten through grade 3.

New product update

Braille support in Star CBM Reading and Star CBM Math.


See sample measures from Star CBM

Letter Sounds

This Star CBM Reading measure assesses students’ understanding of alphabetic principle and print concepts, asking them to produce the sound associated with each consonant (both upper and lower case).

Letter Sounds screenshot from Star CBM.

Passage Oral Reading

This measure assesses students’ decoding and fluency skills when reading connected text, with high correlations to comprehension.

Oral Reading screenshot from Star CBM.

Quantity Comparison

This Star CBM Math measure assesses students’ understanding of number sense, a foundation for later analysis and reasoning.

Star CBM Math quality comparison screenshot.

Mixed Addition and Subtraction

This Star CBM measure assesses students’ growing ability to solve simple addition and subtraction “math facts” critical to continued mathematical achievement.

Mixed Addition and Subtraction screenshot in Star CBM.


A strong foundation for success

myIGDIs for Preschool

Put your earliest learners on the pathway to kindergarten readiness with research-based indicators for early literacy (in both English and Spanish), early numeracy, social-emotional development, and more.

Star Early Literacy

Discover the computer-adaptive assessment that measures early literacy and numeracy skills, providing reliable data about phonological awareness, phonics, word recognition, counting, and more. Available in both English and Spanish.

I like the fact that Star CBM is computer-based, so it is very convenient to use and saves teachers time. Also, the Oral Reading Fluency passages are more aligned to specific grade levels than other reading assessments we have used.

Leigh Twigg • Professional Development Specialist, Calhoun County Schools (AL)


Expand your perspective with complementary data from Star computer-adaptive and Star curriculum-based measurement assessments.


Learn how Star CBM and Star computer-adaptive measures provide complementary data to help address your data needs.

Explore features, review research, get funding resources, and more

Discover the power of Renaissance Star Assessments

Let’s talk about introducing Star CBM in your school or district!

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