Keep going. If you stack as many blocks as you can, what is the farthest overhang you can achieve before the entire structure topples? Is it possible for the tower to extend a full block length beyond ...

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 ...

Number sense is so ingrained that many adults don’t remember being taught such early math skills, much like learning how to read. But unlike the recent wave of evidence on science-based reading ...