Counting and Cardinality
Counting & Cardinality is the ability to understand the relationship between numbers and quantities. Before learning to count, a student needs to understand “one to one correspondence.” This means they are able to match one object to one other object. They also need to understand that the total quantity in a set can be determined by subitizing or counting. While subitizing allows students to perceive the cardinality of small sets, counting requires them to understand that the last number in the counting sequence represents the quantity of the set.