Throughout Tiffany Trevenen’s more than 30-year career in Moffat County schools in Craig, Colo., she has seen students experience the same math struggles again and again. “It was very apparent in ...

Students in Melissa Williams' kindergarten class at the Westminster School in Atlanta, Georgia, practice connecting quantities to written numbers — a key part of number sense. Credit: Holly Korbey for ...

Experts estimate that 3 to 7 percent of the global population has developmental dyscalculia, although it often goes undiagnosed. The disorder may be poorly understood, but it is very real—and so are ...

Editor's note: This story, written by David Bornstein at The New York Times in New York City, New York, is part of the SoJo Exchange from the Solutions Journalism Network, a nonprofit organization ...