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 ...

Indian teenager Aaryan Shulka performs calculations in his head quicker than most people can use a calculator. At a recent event hosted by Guinness World Records, 14-year-old Shulka shattered six ...

Image made with elements from Canva. Let’s go back to grade school—do you remember learning about prime numbers? They’re numbers that can only be divided by themselves and one. So 2, 3, 5, 7, 11, and ...