Two students in Danielle Adler’s kindergarten class at Marcus Hook Elementary School in Marcus Hook, Pa., prepare for an addition problem. Credit: Holly Korbey for The Hechinger Report The Hechinger ...

In Jodie Murphy’s kindergarten class in Aston, Pennsylvania, math lessons go beyond the basics of counting and recognizing numbers. On a recent morning, the children used plastic red and yellow dots ...

In Jodie Murphy's kindergarten class in Aston, Pennsylvania, math lessons go beyond the basics of counting and recognizing numbers. On a recent morning, the children used plastic red and yellow dots ...

Child playing with different color wooden rings on a board with painted numbers and dots. In Jodie Murphy’s kindergarten class in Aston, Pennsylvania, math lessons go beyond the basics of counting and ...