A scientific review finds that children build the strongest math skills through a blend of conceptual understanding, strategic practice, and reflective learning, challenging the idea that speed alone defines fluency.
Should children focus on memorizing number values and multiplication tables, or is it more effective to teach math through a deeper, conceptual approach? This question has long divided educators.
A new report published in Psychological Science in the Public Interest offers a science-backed answer: the most effective way for children to learn arithmetic is through a structured, evidence-based cycle. This cycle begins with building a strong conceptual understanding of math, followed by brief periods of timed practice to promote automatic recall, and concludes with reflective discussion to reinforce and deepen that understanding.
Drawing from research in developmental cognitive science, the report outlines how to best support children’s arithmetic fluency—the ability to solve math problems quickly and accurately. The authors also propose a broader definition of fluency: it includes not just the rapid recall of facts (e.g., 6 × 8 = 48), but also the ability to recognize and apply number relationships when solving problems.
The authors of the paper include Nicole McNeil (University of Notre Dame), Nancy Jordan (University of Delaware), Alexandria Viegut (University of Wisconsin–Eau Claire), and Daniel Ansari (Western University). The researchers—all experts on children’s math learning—describe findings on how arithmetic fluency develops, why it matters, and how educators can help students achieve it.
“We want to be clear: Educators don’t have to choose between timed practice and rich classroom discussions,” said lead author Nicole McNeil. “A carefully structured approach—pairing brief, timed sessions that strengthen facts in memory with purposeful reasoning and discussion activities that weave those facts into an integrated knowledge network—gives students the fluency they need to succeed.”
The Science Behind Fluency
The paper incorporates findings from behavioral experiments, longitudinal studies, neuroimaging, and design-based research to highlight the building blocks and consequences of fluency, which begins with number sense and numerical reasoning in preschool years. Much like phonics support reading, early math experiences help children understand the meaning of numbers, relations, and operations. Parents and educators can use opportunities to help children count and label the total number of objects in everyday sets, such as blocks or cereal bits, the authors suggest.
To explain how fluency develops, the authors turn to foundational theories in cognitive development that frame arithmetic learning not as a linear path, but as intertwined shifts between implicit and explicit knowledge. Children first begin with intuitive insights; they combine numbers without being able to communicate their reasoning (implicit knowledge). Gradually, they make that knowledge explicit, articulating patterns and strategies (e.g., “start with the bigger number,” “order doesn’t matter in addition”) and justifying why they work. Deliberate, well-structured practice then re-proceduralizes this explicit knowledge, allowing students to retrieve facts and strategies automatically, with little mental effort.
Effective Instructional Practices
Instruction should nurture shifts in both directions between implicit and explicit knowledge, the authors say, drawing out the reasoning behind early intuitions and providing enough targeted practice for those ideas to become fast and effortless for higher‑level problem solving. Early arithmetic instruction, they assert, should include the following:
- Early progress monitoring to identify gaps in a child’s mental grasp of numbers.
- Explicit instruction on thinking strategies, such as using 10 as a reference point for easy mental calculations.
- Well-structured retrieval practice in which children recall arithmetic combinations and their sums or products.
- Time-limited practice that nudges students toward fast retrieval strategies over slower counting methods. However, this should be used only after children demonstrate high <span class="glossaryLink" aria-describedby="tt" data-cmtooltip="
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- Discussion, reflection, and justification, giving students the opportunity to articulate their thinking in math activities and helping them understand the underlying principles of arithmetic.
Why Fluency Matters
The authors also discuss the important role math fluency plays in children’s futures. Studies show that students with strong fluency are better equipped to learn algebra, solve word problems, and reason with fractions. Research also links fluency with later-life outcomes like educational attainment and income.
The researchers call for evidence-based instructional practices that reflect what we know about how children learn. They advocate for more developmental cognitive science in teacher preparation programs, particularly in early childhood education, so that teachers can evaluate instructional strategies through the lens of learning science.
In an accompanying commentary, developmental psychologist Melissa E. Libertus (University of Pittsburgh) said the review raises a few factors for future research, such as the use of digital tools to facilitate personal arithmetic learning and the role of parents’ math anxiety in their children’s math skills.
Nevertheless, McNeil and her coauthors provide a convincing argument, Libertus said, because fluency instruction plays an important role in helping students develop math skills to succeed in tomorrow’s workforce.
References: “What the Science of Learning Teaches Us About Arithmetic Fluency” by Nicole M. McNeil, Nancy C. Jordan, Alexandria A. Viegut and Daniel Ansari, 1 April 2025, Psychological Science in the Public Interest.
DOI: 10.1177/15291006241287726
“The Importance of Early Mathematical Foundations, Sensemaking, and the Home Environment for Children’s Development of Arithmetic Fluency: Commentary on McNeil et al. (2025)” by Melissa E. Libertus, 1 April 2025, Psychological Science in the Public Interest.
DOI: 10.1177/15291006251326581
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