Science behind the Diagnostic: How It Works and What It Means

The i-Ready Diagnostic is an adaptive assessment that measures key content domains in Mathematics and Reading in Grades K–12. It is designed to provide accurate and actionable data to help educators guide students toward continued growth. 

"i-Ready Diagnostic: What it Measures" brochure cover.

What the Diagnostic Measures

The i-Ready Diagnostic for Reading and for Mathematics measures the concepts critical to preparing a student for grade-level success.

"i-Ready Diagnostic: How it Works" brochure cover.

How the Diagnostic Works

The computer-adaptive i-Ready Diagnostic assessment has specific test flows, stopping rules, and other characteristics that make it an efficient and rigorous measure of student learning. 

i-Ready Reading Test Flow FAQs.
FAQ: What is the test flow of the i-Ready Diagnostic for Reading?

Test flow is the order in which students receive test items from each domain on the i-Ready Diagnostic. The i-Ready Diagnostic for Reading’s test flow varies by chronological grade level.

i-Ready Mathematics Test Flow FAQs.
FAQ: What is the test flow of the i-Ready Diagnostic for Mathematics?

Test flow is the order in which students receive test items from each domain on the i-Ready Diagnostic. The i-Ready Diagnostic for Mathematics’s test flow varies by grade band.

An FAQ about test duration and i-Ready Diagnostic.

i-Ready Diagnostic’s Assessment Duration

The amount of time it takes a student to complete the Diagnostic can vary by grade, subject, and other factors.

Brochure cover, i-Ready and the Science of Reading.

i-Ready: Aligned with the Science of Reading

i-Ready Assessments and i-Ready Personalized Instruction are aligned with the Science of Reading in a number of ways.