The order in which items are counted is irrelevant. Students have an understanding of order irrelevance when they are able to count a group of items starting from...

# Playlist - Counting and Quantity Principles

Conservation is the counting and quantity principle referring to the understanding that the count for a set group of objects stays the same no matter whether they are...

Abstraction is the counting and quantity principle referring to the understanding that we can count any collection of objects, whether tangible or not. For example, the...

One to One Correspondence is the counting and quantity principle referring to the understanding that each object in a group can be counted once and only once. It...

Cardinality is the counting and quantity principle referring to the understanding that the last number used to count a group of objects represents how many are in the...

In general, subitizing is the ability to “see” or visualize a small amount of objects and know how many there are without counting. While this idea may seem simple on...

Hierarchical Inclusion is the counting and quantity principle that refers to understanding that all numbers preceding a number can be or are systematically included in...

Movement is Magnitude is the counting and quantity principle that refers to the understanding that as you move up the counting sequence (or forwards), the quantity...

Unitizing is the understanding that you can count a large group of items by counting smaller, equal groups of items from within the large group.