i-Ready
Assessment-linked adaptive instruction
We publish a full Four-Mismatches fit assessment for the student-facing exam tools first. For this one, the facts below are what we have verified — run the Four Mismatches Test on it yourself for your own students.
Independence: Addestra builds learning products too (MathsTutor, TinkerWell). We never review or score our own, and no tool pays to be listed or to rank higher — how we assess fit.
What it does
What the AI actually does — A computer-adaptive diagnostic that adjusts difficulty in real time (targeting ~50/50 correct) to place a student on a cross-grade progression.
Why it was built — Give teachers a fast, accurate read on each student's true instructional level, then auto-build a personalised path.
Who built it
- Company
- Curriculum Associates, LLC
- Founders
- Frank Ferguson (Curriculum Associates; full founder list [TBD])
- HQ / origin
- North Billerica, Massachusetts, USA
- Founded
- Curriculum Associates 1969; i-Ready 2011
- Model
- B2G
- Ownership
- Curriculum Associates majority-owned by Berkshire Partners & Permira (2017)
- Exam systems
- US Common Core
- Languages
- English · Spanish
We record durable facts only — no funding-raised or user-count figures. Unverified fields are marked [TBD] rather than guessed.
Where it sits
i-Ready is on the EdTech AI 100 map, in maths & adaptive practice, built in United States.
Related & alternatives
- IXL LearningAdaptive practice and diagnostics across subjects
- ALEKSAdaptive maths and science, grounded in knowledge-space theory