Why can’t my students mentally manipulative numbers? Why can’t my students adjust numbers to make them friendly for computation? The answer: Subitizing Subitizing is the quick recognition of a quantity of objects without counting (Clements & Sarama, 2007). There are two types...

One of the greatest joys of being a kindergarten teacher is witnessing the growth that occurs over the course of a year right in front of your eyes. Sometimes that growth seems to occur over night; watching them struggle...