Have an assessment score?
If your child has taken ROAM, this page points you at matching practice.
What ROAM is
The Rapid Online Assessment of Math is a free, fast math assessment from the Brain Development & Education Lab at Stanford. It has four parts, and each one measures something different.
Izzi Math is practice, not assessment. It never produces a score, never predicts one, and never replaces ROAM. The link runs one way: if you happen to have a ROAM result, this page can point you at the right practice here.
ROAM is one of several influences on what Izzi Math contains — the topic order comes from Illustrative Mathematics, and the activity designs come from the wider maths education research. You do not need a ROAM score, or any score, to use this site.
The four parts
ALPACA — Core Math
Grade-level math knowledge across counting, place value, operations, and fractions.
MagPI — Magnitude Processing
The sense of how big a number is — the foundation everything else sits on.
ARF — Fact Retrieval
Whether single-digit facts come back instantly, without counting.
CALF — Calculation Fluency
Running a multi-digit written procedure correctly — carrying, borrowing, long multiplication.
Reading the score
ROAM reports a support category. These are the lab's own thresholds and wording.
| Band | Percentile | What it means | What to do |
|---|---|---|---|
| Needs extra support | below the 20th percentile | This skill is likely holding them back from grade-level material. | Start below grade level and build the foundation first. Short, frequent sessions. |
| Developing skill | the 20th to 40th percentile | Below average for their age, but growing. | Practise this skill directly alongside grade-level work. |
| Achieved skill | above the 40th percentile | Not holding them back from grade-level material. | Keep it warm with light practice, and push into the next thing. |
The lab says "needs extra support" rather than "high risk" on purpose — it names the action to take, not a label for the child. We use the same words.
Find your practice
Pick the part of ROAM and the band you were given.