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# Subitizing Number Sense

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Subitizing Number Sense

What is Subitizing?
The ability to subitize is an important part of developing a strong mathematical foundation.
There are two components of subitizing; conceptual and perceptual. Perceptual subitizing is the instant visual recognition of a pattern such as the dots on a die. Conceptual subitizing is recognizing smaller groups and adding them together, such as two dots plus two dots equals four dots.
Understanding “how many” without counting will help children:
• Count on from a known patterned set
• Combine numbers from sets
• Develop mathematical fluency
Subitizing Activities
One of the games I use to practice subitizing is Quick Images from the math program Investigations. In this game you show cards with dot patterns quickly to the students in large group. The students have to identify how many dots they see without counting and hold up the corresponding number of fingers. This is a great game but it gets old when you play it all the time so I decided to make it thematic to spice things up.

Dot plate
Put dots on a plate an flash, allow students to build and say with you

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