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## WA.2.1.Core Content: Place value and the base ten system (Numbers) Students refine their understanding of the base ten number system and use place value concepts of ones, tens, and hundreds to understand number relationships. They become fluent in writing and renaming numbers in a variety of ways. This fluency, combined with the understanding of place value, is a strong foundation for learning how to add and subtract two-digit numbers.

Core Content: Place value and the base ten system (Numbers) Students refine their understanding of the base ten number system and use place value concepts of ones, tens, and hundreds to understand number relationships. They become fluent in writing and renaming numbers in a variety of ways. This fluency, combined with the understanding of place value, is a strong foundation for learning how to add and subtract two-digit numbers.
2.1.A. Count by tens or hundreds forward and backward from 1 to 1,000, starting at any number.
Flip Charts Circle Around
Flip Charts Counting 1-100
Flip Charts Number Order
Vocabulary Terms Skip Counting
Vocabulary Terms Skip Counting
Quiz, Flash Cards, Worksheet, Game & Study Guide Skip Counting
Quiz, Flash Cards, Worksheet, Game & Study Guide Skip Counting
Quiz, Flash Cards, Worksheet, Game & Study Guide Skip Counting

2.1.B. Connect place value models with their numerical equivalents to 1,000.
Flip Charts Box It Up
Flip Charts Place Value
Vocabulary Terms Estimation
Vocabulary Terms Expanding Numbers
Vocabulary Terms Greater Than/Less Than
Vocabulary Terms Place Value
Vocabulary Terms Place Value
Vocabulary Terms Place Value
Quiz, Flash Cards, Worksheet, Game & Study Guide Estimation
Quiz, Flash Cards, Worksheet, Game & Study Guide Expanding Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Greater Than/Less Than
Quiz, Flash Cards, Worksheet, Game & Study Guide Ordering and Comparing Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Place Value
Quiz, Flash Cards, Worksheet, Game & Study Guide Place Value
Quiz, Flash Cards, Worksheet, Game & Study Guide Place Value
Quiz, Flash Cards, Worksheet, Game & Study Guide Rounding to Nearest 10

2.1.C. Identify the ones, tens, and hundreds place in a number and the digits occupying them.
Flip Charts Box It Up
Flip Charts Place Value
Vocabulary Terms Estimation
Vocabulary Terms Expanding Numbers
Vocabulary Terms Greater Than/Less Than
Vocabulary Terms Place Value
Vocabulary Terms Place Value
Quiz, Flash Cards, Worksheet, Game & Study Guide Estimation
Quiz, Flash Cards, Worksheet, Game & Study Guide Expanding Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Greater Than/Less Than
Quiz, Flash Cards, Worksheet, Game & Study Guide Ordering and Comparing Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Place Value
Quiz, Flash Cards, Worksheet, Game & Study Guide Place Value

2.1.D. Write three-digit numbers in expanded form.
Flip Charts Box It Up
Flip Charts Place Value
Vocabulary Terms Expanding Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Expanding Numbers

2.1.E. Group three-digit numbers into hundreds, tens, and ones in more than one way.
Flip Charts Columns Across
Flip Charts Counting 1-100
Flip Charts Equal
Flip Charts Function Machine
Flip Charts Magic Squares
Flip Charts More or Less
Flip Charts Number 1
Flip Charts Number 10
Flip Charts Number 2
Flip Charts Number 3
Flip Charts Number 4
Flip Charts Number 5
Flip Charts Number 6
Flip Charts Number 7
Flip Charts Number 8
Flip Charts Number 9
Flip Charts Number Order
Flip Charts One-to-One
Flip Charts Subtraction
Flip Charts Subtraction Facts
Vocabulary Terms Subtraction Facts
Vocabulary Terms Subtraction Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Addition Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Addition Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Subtraction Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Subtraction Facts

2.1.F. Compare and order numbers from 0 to 1,000.
Flip Charts Circle Around
Flip Charts Counting 1-100
Flip Charts Number 1
Flip Charts Number 10
Flip Charts Number 2
Flip Charts Number 3
Flip Charts Number 4
Flip Charts Number 5
Flip Charts Number 6
Flip Charts Number 7
Flip Charts Number 8
Flip Charts Number 9
Flip Charts Number Order
Flip Charts Place Value
Vocabulary Terms Comparing Numbers
Vocabulary Terms Counting to 999
Vocabulary Terms Greater Than/Less Than
Vocabulary Terms Greater Than, Less Than
Vocabulary Terms Sequencing
Vocabulary Terms Sequencing
Quiz, Flash Cards, Worksheet, Game & Study Guide Comparing Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Counting to 999
Quiz, Flash Cards, Worksheet, Game & Study Guide Greater Than/Less Than
Quiz, Flash Cards, Worksheet, Game & Study Guide Greater Than, Less Than
Quiz, Flash Cards, Worksheet, Game & Study Guide Ordering and Comparing Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Ordering Numbers and Objects by Size
Quiz, Flash Cards, Worksheet, Game & Study Guide Sequencing
Quiz, Flash Cards, Worksheet, Game & Study Guide Sequencing
Quiz, Flash Cards, Worksheet, Game & Study Guide Using Number Line

## WA.2.2.Core Content: Addition and subtraction (Operations, Geometry/Measurement, Algebra) Students focus on what it means to add and subtract as they become fluent with single-digit addition and subtraction facts and develop addition and subtraction procedures for two-digit numbers. Students make sense of these procedures by building on what they know about place value and number relationships and by putting together or taking apart sets of objects. This is students' first time to deal formally with step-by-step procedures (algorithms) - an important component of mathematics where a generalizable technique can be used in many similar situations. Students begin to use estimation to determine if their answers are reasonable.

Core Content: Addition and subtraction (Operations, Geometry/Measurement, Algebra) Students focus on what it means to add and subtract as they become fluent with single-digit addition and subtraction facts and develop addition and subtraction procedures for two-digit numbers. Students make sense of these procedures by building on what they know about place value and number relationships and by putting together or taking apart sets of objects. This is students' first time to deal formally with step-by-step procedures (algorithms) - an important component of mathematics where a generalizable technique can be used in many similar situations. Students begin to use estimation to determine if their answers are reasonable.
2.2.A. Quickly recall basic addition facts and related subtraction facts for sums through 20.
Flip Charts Columns Across
Flip Charts Counting 1-100
Flip Charts Counting 1-100
Flip Charts Equal
Flip Charts Function Machine
Flip Charts Magic Squares
Flip Charts More or Less
Flip Charts Number 1
Flip Charts Number 10
Flip Charts Number 2
Flip Charts Number 3
Flip Charts Number 4
Flip Charts Number 5
Flip Charts Number 6
Flip Charts Number 7
Flip Charts Number 8
Flip Charts Number 9
Flip Charts Number Order
Flip Charts Number Order
Flip Charts One-to-One
Flip Charts Step It Up
Flip Charts Subtraction
Flip Charts Subtraction
Flip Charts Subtraction Facts
Vocabulary Terms Commutative Property
Vocabulary Terms One Less, One More
Vocabulary Terms One More, One Less
Vocabulary Terms Story Problems
Vocabulary Terms Story Problems
Vocabulary Terms Subtraction Facts
Vocabulary Terms Subtraction Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Addition Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Addition Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Commutative Property
Quiz, Flash Cards, Worksheet, Game & Study Guide Double Digit Addition without Regrouping
Quiz, Flash Cards, Worksheet, Game & Study Guide One Less, One More
Quiz, Flash Cards, Worksheet, Game & Study Guide One More, One Less
Quiz, Flash Cards, Worksheet, Game & Study Guide Story Problems
Quiz, Flash Cards, Worksheet, Game & Study Guide Story Problems
Quiz, Flash Cards, Worksheet, Game & Study Guide Subtraction Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Subtraction Facts
Quiz, Flash Cards, Worksheet, Game & Study Guide Subtraction is not Commutative
Quiz, Flash Cards, Worksheet, Game & Study Guide Using Number Line

2.2.B. Solve addition and subtraction word problems that involve joining, separating, and comparing and verify the solution.
Vocabulary Terms Story Problems
Vocabulary Terms Word Problems
Vocabulary Terms Story Problems
Quiz, Flash Cards, Worksheet, Game & Study Guide Story Problems
Quiz, Flash Cards, Worksheet, Game & Study Guide Word Problems
Quiz, Flash Cards, Worksheet, Game & Study Guide Story Problems

2.2.C. Add and subtract two-digit numbers efficiently and accurately using a procedure that works with all two-digit numbers and explain why the procedure works.
Flip Charts Columns Across
Flip Charts Function Machine
Flip Charts Magic Squares
Flip Charts Step It Up
Vocabulary Terms Double Digit Subtraction
Vocabulary Terms Regrouping
Vocabulary Terms Word Problems
Quiz, Flash Cards, Worksheet, Game & Study Guide 3 Digit Addition
Quiz, Flash Cards, Worksheet, Game & Study Guide 3 Digit Subtraction
Quiz, Flash Cards, Worksheet, Game & Study Guide Double Digit Addition
Quiz, Flash Cards, Worksheet, Game & Study Guide Double Digit Addition without Regrouping
Quiz, Flash Cards, Worksheet, Game & Study Guide Double Digit Subtraction
Quiz, Flash Cards, Worksheet, Game & Study Guide Regrouping
Quiz, Flash Cards, Worksheet, Game & Study Guide Word Problems

2.2.D. Add and subtract two-digit numbers mentally and explain the strategies used.
Flip Charts Columns Across
Flip Charts Function Machine
Flip Charts Magic Squares
Flip Charts Step It Up
Vocabulary Terms Double Digit Subtraction
Vocabulary Terms Regrouping
Vocabulary Terms Word Problems
Quiz, Flash Cards, Worksheet, Game & Study Guide 3 Digit Addition
Quiz, Flash Cards, Worksheet, Game & Study Guide 3 Digit Subtraction
Quiz, Flash Cards, Worksheet, Game & Study Guide Double Digit Addition
Quiz, Flash Cards, Worksheet, Game & Study Guide Double Digit Addition without Regrouping
Quiz, Flash Cards, Worksheet, Game & Study Guide Double Digit Subtraction
Quiz, Flash Cards, Worksheet, Game & Study Guide Regrouping
Quiz, Flash Cards, Worksheet, Game & Study Guide Word Problems

2.2.E. Estimate sums and differences.
2.2.F. Create and state a rule for patterns that can be generated by addition and extend the pattern.
Vocabulary Terms Number Patterns
Quiz, Flash Cards, Worksheet, Game & Study Guide Number Patterns
Quiz, Flash Cards, Worksheet, Game & Study Guide Patterns

2.2.G. Solve equations in which the unknown number appears in a variety of positions.
Quiz, Flash Cards, Worksheet, Game & Study Guide Determine the One Operation Function
Quiz, Flash Cards, Worksheet, Game & Study Guide Open Number Sentences

2.2.H. Name each standard U.S. coin, write its value using the dollar sign and the cents sign, and name combinations of other coins with the same total value.
Flip Charts How much?
Flip Charts How much?
Flip Charts Money
Flip Charts Money
Flip Charts Money
Vocabulary Terms Counting Coins
Vocabulary Terms Money
Vocabulary Terms Counting Money
Quiz, Flash Cards, Worksheet, Game & Study Guide Adding Money
Quiz, Flash Cards, Worksheet, Game & Study Guide Counting Coins
Quiz, Flash Cards, Worksheet, Game & Study Guide Giving Change from \$1.00
Quiz, Flash Cards, Worksheet, Game & Study Guide Money
Quiz, Flash Cards, Worksheet, Game & Study Guide Counting Money

2.2.I. Determine the value of a collection of coins totaling less than \$1.00.
Flip Charts How much?
Flip Charts How much?
Flip Charts Money
Flip Charts Money
Vocabulary Terms Counting Coins
Vocabulary Terms Money
Vocabulary Terms Counting Money
Quiz, Flash Cards, Worksheet, Game & Study Guide Adding Money
Quiz, Flash Cards, Worksheet, Game & Study Guide Counting Coins
Quiz, Flash Cards, Worksheet, Game & Study Guide Giving Change from \$1.00
Quiz, Flash Cards, Worksheet, Game & Study Guide Money
Quiz, Flash Cards, Worksheet, Game & Study Guide Counting Money

## WA.2.3.Core Content: Measurement (Geometry/Measurement) Students understand the process of measuring length and progress from measuring length with objects such as toothpicks or craft sticks to the more practical skill of measuring length with standard units and tools such as rulers, tape measures, or meter sticks. As students are well acquainted with two-digit numbers by this point, they tell time on different types of clocks.

Core Content: Measurement (Geometry/Measurement) Students understand the process of measuring length and progress from measuring length with objects such as toothpicks or craft sticks to the more practical skill of measuring length with standard units and tools such as rulers, tape measures, or meter sticks. As students are well acquainted with two-digit numbers by this point, they tell time on different types of clocks.
2.3.A. Identify objects that represent or approximate standard units and use them to measure length.
Flip Charts How long?
Flip Charts Liquid Measure
Flip Charts Measuring Length
Vocabulary Terms Comparing Objects
Vocabulary Terms Measurement
Vocabulary Terms Measurement
Vocabulary Terms Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Comparing Objects
Quiz, Flash Cards, Worksheet, Game & Study Guide Determine Appropriate Standard of Units
Quiz, Flash Cards, Worksheet, Game & Study Guide Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Units of Measure

2.3.C. Measure length to the nearest whole unit in both metric and U.S. customary units.
Flip Charts How long?
Flip Charts Liquid Measure
Flip Charts Measuring Length
Vocabulary Terms Comparing Objects
Vocabulary Terms Measurement
Vocabulary Terms Measurement
Vocabulary Terms Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Comparing Objects
Quiz, Flash Cards, Worksheet, Game & Study Guide Determine Appropriate Standard of Units
Quiz, Flash Cards, Worksheet, Game & Study Guide Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Measurement
Quiz, Flash Cards, Worksheet, Game & Study Guide Units of Measure

2.3.E. Use both analog and digital clocks to tell time to the minute.
Flip Charts Hour/Half Hour
Flip Charts Hour/Half Hour
Flip Charts Telling Time
Flip Charts Time
Flip Charts Time
Flip Charts What time of day?
Flip Charts What time of day?
Vocabulary Terms Telling Time
Vocabulary Terms Time
Vocabulary Terms Time
Quiz, Flash Cards, Worksheet, Game & Study Guide Telling Time
Quiz, Flash Cards, Worksheet, Game & Study Guide Time
Quiz, Flash Cards, Worksheet, Game & Study Guide Time

## WA.2.4.Additional Key Content (Numbers, Operations, Geometry/Measurement, Data/Statistics/Probability) Students make predictions and answer questions about data as they apply their growing understanding of numbers and the operations of addition and subtraction. They extend their spatial understanding of Core Content in geometry developed in kindergarten and grade one by solving problems involving two- and three-dimensional geometric figures. Students are introduced to a few critical concepts that will become Core Content in grade three. Specifically, they begin to work with multiplication and division and learn what a fraction is.

Additional Key Content (Numbers, Operations, Geometry/Measurement, Data/Statistics/Probability) Students make predictions and answer questions about data as they apply their growing understanding of numbers and the operations of addition and subtraction. They extend their spatial understanding of Core Content in geometry developed in kindergarten and grade one by solving problems involving two- and three-dimensional geometric figures. Students are introduced to a few critical concepts that will become Core Content in grade three. Specifically, they begin to work with multiplication and division and learn what a fraction is.
2.4.A. Solve problems involving properties of two- and three-dimensional figures.
Flip Charts Dot to Dot
Flip Charts Temperature
Vocabulary Terms Perimeter
Quiz, Flash Cards, Worksheet, Game & Study Guide Perimeter

2.4.B. Collect, organize, represent, and interpret data in bar graphs and picture graphs.
Flip Charts Data & Graphs
Vocabulary Terms Graphs
Vocabulary Terms Graphs and Charts
Quiz, Flash Cards, Worksheet, Game & Study Guide Graphs
Quiz, Flash Cards, Worksheet, Game & Study Guide Graphs and Charts

2.4.C. Model and describe multiplication situations in which sets of equal size are joined.
Flip Charts Columns Across
Flip Charts Function Machine
Flip Charts Magic Squares
Vocabulary Terms Multiplication
Quiz, Flash Cards, Worksheet, Game & Study Guide Multiplication

2.4.D. Model and describe division situations in which sets are separated into equal parts.
Quiz, Flash Cards, Worksheet, Game & Study Guide Division

2.4.E. Interpret a fraction as a number of equal parts of a whole or a set.
Flip Charts Box It Up
Flip Charts Fractions
Flip Charts Triangle Tricks
Vocabulary Terms Fractions
Vocabulary Terms Fractions
Quiz, Flash Cards, Worksheet, Game & Study Guide Equivalent Fractions to 1/2
Quiz, Flash Cards, Worksheet, Game & Study Guide Fractions
Quiz, Flash Cards, Worksheet, Game & Study Guide Fractions
Quiz, Flash Cards, Worksheet, Game & Study Guide Fractions
Quiz, Flash Cards, Worksheet, Game & Study Guide Fractions Greater Than or Less Than 1/2

## WA.2.5.Core Processes: Reasoning, problem solving, and communication - Students further develop the concept that doing mathematics involves solving problems and talking about what they did to solve those problems. Second-grade problems emphasize addition and subtraction with increasingly large numbers, measurement, and early concepts of multiplication and division. Students communicate their mathematical thinking and make increasingly more convincing mathematical arguments. Students participate in mathematical discussions involving questions like ''How did you get that?''; ''Why did you use that strategy?''; and ''Why is that true?'' Students continue to build their mathematical vocabulary as they use correct mathematical language appropriate to grade two when discussing and refining solutions to problems.

Core Processes: Reasoning, problem solving, and communication - Students further develop the concept that doing mathematics involves solving problems and talking about what they did to solve those problems. Second-grade problems emphasize addition and subtraction with increasingly large numbers, measurement, and early concepts of multiplication and division. Students communicate their mathematical thinking and make increasingly more convincing mathematical arguments. Students participate in mathematical discussions involving questions like ''How did you get that?''; ''Why did you use that strategy?''; and ''Why is that true?'' Students continue to build their mathematical vocabulary as they use correct mathematical language appropriate to grade two when discussing and refining solutions to problems.
2.5.A. Identify the question(s) asked in a problem and any other questions that need to be answered in order to solve the problem.

2.5.B. Identify the given information that can be used to solve a problem.

2.5.C. Recognize when additional information is required to solve a problem.

2.5.D. Select from a variety of problem-solving strategies and use one or more strategies to solve a problem.

2.5.E. Identify the answer(s) to the question(s) in a problem.

2.5.F. Describe how a problem was solved.

2.5.G. Determine whether a solution to a problem is reasonable.