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This page provides examples of Kindergarten Number Activities aligned with the Common Core State Standards. All activities are suitable for use in Math Centers, small group or whole class settings and are designed to provide opportunities for students to communicate their reasoning and mathematical thinking. All files for the Kindergarten Number Activities listed are in PDF format and can be accessed using Adobe Reader. For more K math ideas click on the eBook covers on the left.
K. CC2 Count forward beginning from a given 
K.CC3 Write numbers from 0 to 20. Represent a number of objects with a written numeral 020 (with 0 representing a count of no objects).
Count to tell the number of objects
K.CC4 Understand the relationship between numbers and quantities; connect counting to cardinality.
a.
When counting objects, say the number names in the standard order,
pairing each object with one and only one number name and each number
name with one and only one object.
b. Understand that the last number
name said tells the number of objects counted. The number of objects is
the same regardless of their arrangement or the order in which they
were counted.
c. Understand that each successive number name refers to a quantity that is one larger.
Possible Activities: *Blank 5 and 10 frames and enlarged frames with dots can be found on the Math Resources page. 
K.CC5 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 120,
count out that many objects.
Possible Activities: The Enormous Watermelon The Very Hungry Caterpillar Ten Black Dots Rooster's Off to See the World 
Playdough Numbers 
Compare numbers
K.CC6
Identify whether the number of objects in one group is greater than,
less than, or equal to the number of objects in another group
Possible Activities:
Greater Than/Less Than
K.CC7 Compare two numbers between 1 and 10 presented as written numerals.
Greater Than
Less Than
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from
K.OA1
Represent addition and subtraction with objects, fingers, mental
images, drawings, sounds (e.g., claps), acting out situations, verbal
explanations, expressions, or equations.
Possible Activities:
Addition Plate
How Many Bears in the Cave?
Unifix Towers
Make 5 on the Five Frame
K.OA2 Solve addition and subtraction word problems, and add and
subtract within 10, e.g. by using objects or drawings to represent the
problem.
Possible Activities:
Dot Card Addition Dot Cards 112
Part Whole Mats
Domino Addition
My Ten Frame Riddle
K.OA3 Decompose numbers less than or equal to 10 into pairs in
more than one way, e.g. by using objects or drawings, and record each
decomposition by a drawing or equation (e.g. 5= 2 + 3 and 5 = 4+1)
Possible Activities: Ten Flashing Fireflies Mouse Count 
K.OA4 For any number from 1 to 9, find the number that makes 10
when added to the given number, e.g., by using objects or drawings, and
record the answer with a drawing or equation.
Possible Activities:
Facts of Ten
Make 10
Making Apple Ten Packs
K.OA5 Fluently add and subtract within five
Sums of Five
Five Squares
Facts of Five
Shake 5 and Spill
Work with numbers 1119 to gain foundations for place value
K.NBT1
Compose and decompose numbers from 11 to 19 into ten ones and some
further ones, e.g., by using objects or drawings, and record each
composition or decomposition by a drawing or equation (e.g. 18 = 10 +
8); understand that these numbers are composed of ten ones and one, two,
three, four, five, six, seven, eight, or nine ones.
Possible Activities:
1119 Puzzles
Dot and Numeral Cards (1120)
Cubes on the Ten Frame
Teens on the Ten Frame
Teens on the Ten Frame Book 1
Teens on the Ten Frame Book 2
*N.B. Font used on Teens on Ten Frame books is Primer Print.
Tens and Ones with Unifix Cubes
My Double TenFrame Riddle
Teens on the Rekenrek