Why 120 questions per year can transform maths progress in your class

At Eedi, teachers often ask: “How many quizzes do my students really need to complete to meaningfully improve their maths?” Thanks to a rigorous, externally conducted study, we now have a clear answer: students significantly benefit when they complete at least 120 Eedi check-in questions over the course of a school year.

Here’s what this means in practice — and why it matters for you and your students.

Understanding the magic number: 120 questions ✨

Each Eedi quiz contains 5 check-in questions, so completing 120 questions means finishing around 24 quizzes per year — that’s roughly two quizzes each month.

In practice, students complete about half the quizzes they’re assigned. So to reliably hit the 120-question mark, we recommend assigning one quiz every week. Even if students don’t complete every quiz, this pace helps most of them reach the target of two completed quizzes per month.

What did the independent research find? 🧪

In a large-scale randomised controlled trial (RCT) run by external researchers at WhatWorkedEducation, students using Eedi were assessed using the NWEA MAP Growth maths test — a widely used, curriculum-neutral measure of student progress.

The standout finding: students who answered 120 check-in questions or more showed significantly greater progress in maths than those who answered fewer. When we compared learning gains against control students (who didn’t have access to Eedi), the improvement was equivalent to 3-4 months of additional learning. That’s exciting!

While higher engagement often led to even better outcomes, 120 questions emerged as a critical threshold — the point at which consistent, meaningful improvement became much more likely.

What the research does — and doesn’t — say 📚

It’s important to be clear about what this research does not claim.

While it shows strong benefits for students who reach the 120-question threshold, it doesn’t suggest that this completely closes the achievement gap, such as between low-income and non-low income students.

So while 120 questions isn’t a silver bullet, it is a practical, evidence-based goal that can help guide how you use Eedi to support student progress.

Practical advice for teachers 👨‍🏫

Here’s how to use this insight in your teaching:

• Assign weekly quizzes – A weekly cadence ensures most students reach the 120-question threshold, even if they don’t complete every quiz.
• Track student progress – The Eedi teacher dashboard shows how many questions each student has completed, making it easy to spot who might need a nudge.
• Communicate the goal – Sharing the 120-question target with students and parents can give a clear sense of direction and motivation.

Looking ahead: supporting you to do more with less 🚀

We know that teaching time is precious. That’s why we’re working on ways to make it even easier to act on this insight — such as showing whole-class progress towards the 120-question goal and making quiz assignment quicker and more intuitive directly from the dashboard.

By assigning weekly quizzes, you're not just setting extra work — you’re building habits that lead to deeper understanding, greater confidence, and stronger maths outcomes.

And now, we have the research to back that up.