How can a child demonstrate an understanding of one-to-one correspondence?

A child demonstrates an understanding of one-to-one correspondence by touching and counting each object aloud. This practice involves the child physically interacting with each item as they count, ensuring that they establish a clear, direct connection between the number they are stating and the individual object being counted. This process reinforces the concept that each object is counted only once, which is a foundational skill in understanding quantity and number relationships.

Counting aloud while touching each object supports cognitive development by allowing the child to visualize the numbers associated with the objects, enhancing both memory and comprehension. This activity also helps reinforce number sequencing and the concept of quantity, as the child learns to associate spoken numbers with corresponding physical items.

The other options do not effectively illustrate one-to-one correspondence. For instance, counting without touching objects does not provide the physical interaction needed to grasp the concept, while grouping objects into sets or sorting them by color focuses on classification rather than counting individual items.