Counting and Cardinality
Count to 20 by ones.
Write numbers from 0 to 20.
Count to answer "how many?" questions about as many as 20 things arranged in a line, a rectangular array, or a circle, or as many as 10 things in a scattered configuration; given a number from 1-20, count out that many objects. Compare numbers.
Understand that the last number name said tells the number of objects counted. The number of object is the same regardless of their arrangement or the order in which they were counted.
Identify whether the number of objects in one group is greater than, less than, or equal to the number of objects in another group, e.g., by using matching and counting strategies.