**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 group.

A student who must recount when asked how many candies are in the set that they just counted, may not understand the **cardinality principle**.

For a full summary of all counting principles, read the original blog post.

[…] See this animation in video format here. […]

[…] We then ask students to “show 4 on the number path”. What we are looking for is students showing that 4 includes 4 squares and not just the last square. This builds on the idea of cardinality. […]

[…] counted, may not have an understanding of the cardinality principle. See this animation in video format here. If you are struggling to assess whether a student firmly grasps the cardinal principle, […]