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# Washington Standards Second Grade Mathematics resources

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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

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 Math Grade 2

Flip Charts Place Value

Flip Charts Star Mathematicians

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 Math Grade 2

Flip Charts Place Value

Flip Charts Star Mathematicians

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 Math Grade 2

Flip Charts Place Value

Flip Charts Star Mathematicians

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 Adding & Subtracting Three-digit Numbers

Flip Charts Adding & Subtracting Three-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Addition Facts

Flip Charts Columns Across

Flip Charts Count and Write 1-10

Flip Charts Counting 1-100

Flip Charts Equal

Flip Charts Function Machine

Flip Charts Magic Squares

Flip Charts Math Grade 1

Flip Charts Math Grade 2

Flip Charts Math Grade 3

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 Numbers 1-10 Math Readiness - SPANISH EDITION

Flip Charts One-to-One

Flip Charts Recognizing Numbers 1-10

Flip Charts Subtracting Two-digit Numbers

Flip Charts Subtracting Two-digit Numbers

Flip Charts Subtraction

Flip Charts 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 Addition

Flip Charts Circle Around

Flip Charts Count and Write 1-10

Flip Charts Counting 1-100

Flip Charts Math Grade 2

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 Numbers 1-10 Math Readiness - SPANISH EDITION

Flip Charts Place Value

Flip Charts Recognizing Numbers 1-10

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

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 Adding & Subtracting Three-digit Numbers

Flip Charts Adding & Subtracting Three-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Addition

Flip Charts Addition Facts

Flip Charts Columns Across

Flip Charts Count and Write 1-10

Flip Charts Counting 1-100

Flip Charts Counting 1-100

Flip Charts Equal

Flip Charts Function Machine

Flip Charts Magic Squares

Flip Charts Math Grade 1

Flip Charts Math Grade 2

Flip Charts Math Grade 3

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 Number Sense & Operations Math Readiness

Flip Charts Numbers 1-10 Math Readiness - SPANISH EDITION

Flip Charts One-to-One

Flip Charts Recognizing Numbers 1-10

Flip Charts Step It Up

Flip Charts Subtracting Two-digit Numbers

Flip Charts Subtracting Two-digit Numbers

Flip Charts Subtraction

Flip Charts Subtraction

Flip Charts 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.

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 Adding & Subtracting Three-digit Numbers

Flip Charts Adding & Subtracting Three-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Columns Across

Flip Charts Function Machine

Flip Charts Magic Squares

Flip Charts Math Grade 2

Flip Charts Math Grade 3

Flip Charts Step It Up

Flip Charts Subtracting Two-digit Numbers

Flip Charts Subtracting Two-digit Numbers

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 Adding & Subtracting Three-digit Numbers

Flip Charts Adding & Subtracting Three-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Adding Two-digit Numbers

Flip Charts Columns Across

Flip Charts Function Machine

Flip Charts Magic Squares

Flip Charts Math Grade 2

Flip Charts Math Grade 3

Flip Charts Step It Up

Flip Charts Subtracting Two-digit Numbers

Flip Charts Subtracting Two-digit Numbers

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.

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 Adding Money

Flip Charts Adding Money

Flip Charts All About Money

Flip Charts How much?

Flip Charts How much?

Flip Charts Math Grade 1

Flip Charts Money

Flip Charts Money

Flip Charts Money

Flip Charts Time, Money & Measurement Math Readiness

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 Adding Money

Flip Charts Adding Money

Flip Charts All About Money

Flip Charts How much?

Flip Charts How much?

Flip Charts Math Grade 1

Flip Charts Money

Flip Charts Money

Flip Charts Time, Money & Measurement Math Readiness

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

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 Geometry & Measurement

Flip Charts Geometry & Measurement

Flip Charts How long?

Flip Charts Length, Capacity, Weight & Temperature

Flip Charts Liquid Measure

Flip Charts Math Grade 2

Flip Charts Math Grade 3

Flip Charts Measuring Length

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 Geometry & Measurement

Flip Charts Geometry & Measurement

Flip Charts How long?

Flip Charts Length, Capacity, Weight & Temperature

Flip Charts Liquid Measure

Flip Charts Math Grade 2

Flip Charts Math Grade 3

Flip Charts Measuring Length

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 All About Time

Flip Charts Hour/Half Hour

Flip Charts Hour/Half Hour

Flip Charts Math Grade 1

Flip Charts Math Grade 2

Flip Charts Telling Time

Flip Charts Time

Flip Charts Time

Flip Charts Time, Money & Measurement Math Readiness

Flip Charts What time of day?

Flip Charts What time of day?

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

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

Flip Charts Time, Money & Measurement Math Readiness

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

Flip Charts Grouping & Graphing

Flip Charts Math Grade 2

Flip Charts Patterns & Sorting Math Readiness

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 Division Concepts & Strategies

Flip Charts Division Concepts & Strategies

Flip Charts Function Machine

Flip Charts Magic Squares

Flip Charts Math Grade 3

Flip Charts Multiplication Concepts & Strategies

Flip Charts Multiplication Concepts & Strategies

Flip Charts Multiplication Table

Flip Charts Multiplication Table

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 All About Fractions

Flip Charts All About Fractions

Flip Charts Box It Up

Flip Charts Fractions

Flip Charts Math Grade 1

Flip Charts Math Grade 2

Flip Charts Math Grade 3

Flip Charts Triangle Tricks

Flip Charts Understanding Fractions

Flip Charts Understanding 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

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.

Flip Charts Math Grade 3

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

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

Flip Charts Math Grade 3

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

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

Flip Charts Math Grade 3

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

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

Flip Charts Math Grade 3

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

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

Flip Charts Math Grade 3

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

2.5.F. Describe how a problem was solved.

Flip Charts Math Grade 3

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

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

Flip Charts Math Grade 3

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies

Flip Charts Problem Solving Strategies