Adding numbers can be made considerably easier by learning the proper techniques. Among these arithmetic strategies, the "Make 10" method gives kids more self-assurance and speeds up calculations.

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 ...

Instagram user Erin shared videos of her three-year-old son, Declan, solving large math problems that have caught the attention of thousands online. In one clip, Declan works through the addition ...

Re “Dismal student test scores deserve boos, not cheers” (Oct. 17): I taught sixth-grade math for 24 years and found that the biggest impediment to teaching at that level was that so many students had ...