## Common Core State Standards for Mathematics

Grade(s) K resources related to the following standard:
Operations and Algebraic Thinking
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
1. Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.

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This page provides examples of Kindergarten Number (Counting and Cardinality, Operations and Algebraic Thinking, and Number and Operations in Base Ten) activities aligned with the Common Core State Standards. A CCSS standard is stated and the possible activities are listed below and linked. All activities are suitable for use in Math Centers, small group or whole class settings and are designed to elicit a range of responses and provide opportunities for students to communicate their reasoning and mathematical thinking. Instructions for each task are typed in large print and written in child-friendly language to enable students to work on activities independently after a brief introduction to the task. All files listed are in PDF format.
Activity, Game
In this unit plan, primary learners explore the five models of subtraction (counting, sets, number line, balanced equations, and inverse of addition) using concrete (links), pictorial, and verbal representations to develop an understanding of symbolic notations. Students also investigate fact families, including those where one addend is 0 and where the addends are alike and also learn that the order (commutative) property) does not hold for subtraction. A brief bibliography of related books for children is provided. Instead of using hands on manipulatives and balances, links to Java applets: Pan Balance-Shapes and Pan Balance-Numbers ( both cataloged separately) are included. Instructional plan, questions for the students, assessment options, extensions,and teacher reflections are given for each lesson as well as links to down load all student resources.
Activity, Interactive Media, Lesson Plans, Unit of Instruction
In this 6-lesson unit students use pasta shapes to explore the take away model of subtraction in several different contexts (counting, sets, number line, balanced equations, and inverse of addition). They decompose numbers, explore the zero property, act out subtraction situations with objects and pictures, record differences with vertical and in horizontal notation, create fact families, find differences with a calculator, and compose and solve problems involving subtraction. The lessons include student activity sheets (pdf), questions for student discussion and teacher reflection, assessment options, and links to online applets.
Activity, Game, Lesson Plans, Unit of Instruction
This problem uses the context of a growing plant in which to practice doubling and also to develop representation and recording strategies. The Teachers' Notes page offers suggestions for implementation and discussion as well as ideas for extension and support.
Activity
Grade Level: K, 1, 2, 3
In this lesson students find and record addends that sum to ten in three different activities, using ten frames, linking cubes, two-sided counters, and a concentration game. The lesson includes suggestions for assessment and extension, reflection questions for students and teachers, links to related resources, and printable materials (pdf).
Activity, Game, Interactive Media, Lesson Plans
This interactive and animated Flash book by Greg Tang offers 16 additional mind-stretching math riddles to engage and educate students in the art of problem solving. For younger students, the riddles reinforce important grouping strategies that make adding faster, easier and more efficient. For older students, it helps them transition from adding to multiplying while providing practice with the basic times tables.
Activity, Interactive Media, Illustration, Video
This interactive Flash book by Greg Tang provides readers or listeners to a yearlong journey of 16 poems, pictures and challenging problems. Each math riddle includes topics going in the order of the seasons and their holidays, encouraging children to see numbers and solve problems in smart ways rather than rely on slow, inefficient counting strategies.
Activity, Interactive Media, Illustration, Video