**Colorado Education Standards**.

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CO.K.1. Number Sense, Properties, and Operations

K.1.1. Whole numbers can be used to name, count, represent, and order quantity Students can:

K.1.1.a. Use number names and the count sequence. (CCSS: K.CC)

K.1.1.a.i. Count to 100 by ones and by tens. (CCSS: K.CC.1)

K.1.1.a.ii. Count forward beginning from a given number within the known sequence. (CCSS: K.CC.2)

K.1.1.b. Count to determine the number of objects. (CCSS: K.CC)

K.1.1.b.i. Apply the relationship between numbers and quantities and connect counting to cardinality. (CCSS: K.CC.4)

K.1.1.b.ii. Count and represent objects to 20. (CCSS: K.CC.5)

K.1.1.c. Compare and instantly recognize numbers. (CCSS: K.CC)

K.1.1.c.i. Identify whether the number of objects in one group is greater than, less than, or equal to the number of objects in another group. (CCSS: K.CC.6)

K.1.2. Composing and decomposing quantity forms the foundation for addition and subtraction. Students can:

K.1.2.a. Model and describe addition as putting together and adding to, and subtraction as taking apart and taking from, using objects or drawings. (CCSS: K.OA)

K.1.2.a.i. Represent addition and subtraction with objects, fingers, mental images, drawings, sounds, acting out situations, verbal explanations, expressions, or equations. (CCSS: K.OA.1)

K.1.2.a.ii. Solve addition and subtraction word problems, and add and subtract within 10. (CCSS: K.OA.2)

K.1.2.a.v. Use objects including coins and drawings to model addition and subtraction problems to 10 (PFL).

K.1.2.b. Fluently add and subtract within 5. (CCSS: K.OA.5)