This article was originally published in The Hechinger Report. ASTON, Pa.— In Jodie Murphy’s kindergarten class, math lessons go beyond the basics of counting and recognizing numbers. On a recent ...

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 ...

Ann Kajander receives funding from the Ministry of Education Mathematics Knowledge Network. Jennifer Holm does not work for, consult, own shares in or receive funding from any company or organization ...