# Sharpening, focusing, and developing: A study of change in nonsymbolic number comparison skills and math achievement in 1st grade

> Research article (Developmental Science, 2021) · cited 15× · AI/ML

**Wikidata**: [openalex:W3216691849](https://www.wikidata.org/wiki/openalex:W3216691849)  
**Source**: https://4ort.xyz/entity/sharpening-focusing-and-developing-a-study-of-change-in-nonsymbolic-number-comparison-skills-and-math-achievement-in-1st