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Operations and Algebraic Thinking 1.OA
Add and subtract within 20.
5.Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
TM 1.2.2, 1.2.3, 1.2.4, 1.9.6, 1.9.7, 1.9.8
*Use of the number line and hundreds board

List of resources:
http://www.k-5mathteachingresources.com/1st-grade-number-activities.html