A child’s ability to understand and manipulate sets of numbers in 1st grade predicts how well he or she will succeed in the math required both in secondary school and for day-to-day living, according ...

Jacob's mother writes that ‘Jacob, 10-years-old, still struggles with number bonds to 10. Learning to tell the time is still slow - he has not mastered half-past. Although he managed to learn his 5x ...

https://doi.org/10.4169/math.mag.84.5.369 • https://www.jstor.org/stable/10.4169/math.mag.84.5.369 Copy URL Summary C. F. Gauss discovered a beautiful formula for ...