IXL skill plan | 2nd grade plan for Math Expressions 2013 Common Core

Skill plan for Math Expressions 2013 Common Core - 2nd grade

IXL provides skill alignments with recommended IXL skills for each chapter. Find the IXL skills that are right for you below!

Unit

Print skill plan

1	Unit 1 Addition and Subtraction Within 20
Big Idea 1 - Strategies for Addition and Subtraction
1-1: Represent Addition and Subtraction		1. Addition and subtraction - ways to make a number - up to 20 Also consider: • Add one-digit numbers • Write addition sentences to describe pictures - sums to 20 • Write subtraction sentences to describe pictures - up to 18
1-1: Represent Addition and Subtraction
1. Addition and subtraction - ways to make a number - up to 20 Also consider: • Add one-digit numbers • Write addition sentences to describe pictures - sums to 20 • Write subtraction sentences to describe pictures - up to 18

1-2: Relate Addition and Subtraction		1. Related addition facts 2. Related subtraction facts 3. Fact families
1-2: Relate Addition and Subtraction
1. Related addition facts 2. Related subtraction facts 3. Fact families

1-3: Make-a-Ten Strategies		• Coming soon: Make 10 to add
1-3: Make-a-Ten Strategies
• Coming soon: Make 10 to add

1-4: Relate Unknown Addends and Subtraction		1. Complete the addition sentence - sums to 20 Also consider: • Subtract a one-digit number from a two-digit number up to 18
1-4: Relate Unknown Addends and Subtraction
1. Complete the addition sentence - sums to 20 Also consider: • Subtract a one-digit number from a two-digit number up to 18

1-5: More Practice with Unknown Addends and Teen Totals		1. Relate addition and subtraction sentences Also consider: • Balance addition equations - sums to 20
1-5: More Practice with Unknown Addends and Teen Totals
1. Relate addition and subtraction sentences Also consider: • Balance addition equations - sums to 20

1-6: Odd and Even Numbers		1. Skip-counting sequences - count by twos 2. Even or odd 3. Add doubles - complete the sentence Also consider: • Skip-counting by twos
1-6: Odd and Even Numbers
1. Skip-counting sequences - count by twos 2. Even or odd 3. Add doubles - complete the sentence Also consider: • Skip-counting by twos

1-7: Strategies Using Doubles		1. Add doubles 2. Subtract doubles 3. Add using doubles plus or minus one
1-7: Strategies Using Doubles
1. Add doubles 2. Subtract doubles 3. Add using doubles plus or minus one

1-8: Equations, Equation Chains, and Vertical Form		1. Add and subtract numbers up to 20 2. Complete the subtraction sentence - up to 20 Also consider: • Addition and subtraction sentences up to 20: which is true?
1-8: Equations, Equation Chains, and Vertical Form
1. Add and subtract numbers up to 20 2. Complete the subtraction sentence - up to 20 Also consider: • Addition and subtraction sentences up to 20: which is true?

1-9: Add Three or Four Addends		1. Add three one-digit numbers 2. Add four one-digit numbers
1-9: Add Three or Four Addends
1. Add three one-digit numbers 2. Add four one-digit numbers
Big Idea 2 - Addition and Subtraction Situations
1-10: Add To and Take From Word Problems		1. Addition and subtraction word problems with pictures - up to 10 2. Addition and subtraction word problems - up to 10
1-10: Add To and Take From Word Problems
1. Addition and subtraction word problems with pictures - up to 10 2. Addition and subtraction word problems - up to 10

1-11: Add To and Take From Problems — Unknown in All Positions		1. Addition word problems - sums to 20 2. Subtraction word problems - up to 18
1-11: Add To and Take From Problems — Unknown in All Positions
1. Addition word problems - sums to 20 2. Subtraction word problems - up to 18

1-12: Put Together/Take Apart Problems		1. Addition sentences for word problems - sums to 20 2. Subtraction sentences for word problems - up to 18
1-12: Put Together/Take Apart Problems
1. Addition sentences for word problems - sums to 20 2. Subtraction sentences for word problems - up to 18

1-13: Special Put Together/Take Apart Problems		1. Ways to make a number with addition - sums to 20 2. Ways to subtract - up to 20 Also consider: • Ways to make a number with addition - sums to 10 • Ways to subtract - up to 10
1-13: Special Put Together/Take Apart Problems
1. Ways to make a number with addition - sums to 20 2. Ways to subtract - up to 20 Also consider: • Ways to make a number with addition - sums to 10 • Ways to subtract - up to 10

1-14: Compare Word Problems
1-14: Compare Word Problems


1-15: More Compare Word Problems
1-15: More Compare Word Problems


1-16: Mixed Word Problems		1. Addition and subtraction word problems - up to 20
1-16: Mixed Word Problems
1. Addition and subtraction word problems - up to 20
Big Idea 3 - More Complex Situations
1-17: Problems with Not Enough, Extra, or Hidden Information
1-17: Problems with Not Enough, Extra, or Hidden Information


1-18: More Complex Compare Problems
1-18: More Complex Compare Problems


1-19: Two-Step Word Problems		1. Add three one-digit numbers: word problems Also consider: • Addition and subtraction - balance equations - up to 20
1-19: Two-Step Word Problems
1. Add three one-digit numbers: word problems Also consider: • Addition and subtraction - balance equations - up to 20

1-20: Mixed Word Problems		1. Addition and subtraction sentences for word problems - up to 20 Also consider: • Add four or more one-digit numbers: word problems
1-20: Mixed Word Problems
1. Addition and subtraction sentences for word problems - up to 20 Also consider: • Add four or more one-digit numbers: word problems

1-21: Focus on Mathematical Practices		1. Interpret data in tables
1-21: Focus on Mathematical Practices
1. Interpret data in tables

2	Unit 2 Addition Within 200
Big Idea 1 - Use Place Value
2-1: Ones, Tens, Hundreds		1. Hundreds chart
2-1: Ones, Tens, Hundreds
1. Hundreds chart

2-2: Draw Quick Tens and Quick Hundreds		1. Add multiples of 10
2-2: Draw Quick Tens and Quick Hundreds
1. Add multiples of 10

2-3: Represent Numbers in Different Ways		1. Place value models up to 120 2. Convert to/from a number - tens and ones 3. Writing numbers up to 100 in expanded form 4. Writing numbers up to 100 in words - convert words to digits 5. Writing numbers up to 100 in words - convert digits to words
2-3: Represent Numbers in Different Ways
1. Place value models up to 120 2. Convert to/from a number - tens and ones 3. Writing numbers up to 100 in expanded form 4. Writing numbers up to 100 in words - convert words to digits 5. Writing numbers up to 100 in words - convert digits to words

2-4: Combine Ones, Tens, and Hundreds		1. Add 1 or 10 2. Input/output tables - add 10 Also consider: • Count by tens and hundreds
2-4: Combine Ones, Tens, and Hundreds
1. Add 1 or 10 2. Input/output tables - add 10 Also consider: • Count by tens and hundreds

2-5: Compare Numbers Within 200		1. Comparing numbers up to 100 Also consider: • Put numbers up to 100 in order
2-5: Compare Numbers Within 200
1. Comparing numbers up to 100 Also consider: • Put numbers up to 100 in order
Big Idea 2 - Add 2-Digit Numbers
2-6: Explore 2-Digit Addition		1. Addition word problems - up to two digits
2-6: Explore 2-Digit Addition
1. Addition word problems - up to two digits

2-7: Addition — Show All Totals Method		1. Write the addition sentence - up to two digits Also consider: • Use models to add two-digit numbers - without regrouping • Add two-digit numbers without regrouping - sums to 100
2-7: Addition — Show All Totals Method
1. Write the addition sentence - up to two digits Also consider: • Use models to add two-digit numbers - without regrouping • Add two-digit numbers without regrouping - sums to 100

2-8: Addition — New Groups Below Method		1. Use models to add two-digit numbers - with regrouping 2. Add two-digit numbers with regrouping - sums to 100 Also consider: • Use models to add a two-digit and a one-digit number - with regrouping • Add a two-digit and a one-digit number - with regrouping • Regroup tens and ones - ways to make a number
2-8: Addition — New Groups Below Method
1. Use models to add two-digit numbers - with regrouping 2. Add two-digit numbers with regrouping - sums to 100 Also consider: • Use models to add a two-digit and a one-digit number - with regrouping • Add a two-digit and a one-digit number - with regrouping • Regroup tens and ones - ways to make a number

2-9: Practice Addition with Sums over 100		1. Add two-digit numbers - sums to 200 Also consider: • Regroup tens and ones
2-9: Practice Addition with Sums over 100
1. Add two-digit numbers - sums to 200 Also consider: • Regroup tens and ones

2-10: Choose an Addition Method		1. Addition input/output tables - up to two digits Also consider: • Ways to make a number using addition
2-10: Choose an Addition Method
1. Addition input/output tables - up to two digits Also consider: • Ways to make a number using addition
Big Idea 3 - Money and Fluency for Addition Within 100
2-11: Buy with Pennies and Dimes		1. Count money up to $2 - pennies, dimes, and dollar bills only
2-11: Buy with Pennies and Dimes
1. Count money up to $2 - pennies, dimes, and dollar bills only

2-12: Pennies, Nickels, and Dimes		1. Skip-counting by fives 2. Count money - pennies, nickels, and dimes only
2-12: Pennies, Nickels, and Dimes
1. Skip-counting by fives 2. Count money - pennies, nickels, and dimes only

2-13: Fluency: Addition Within 100		1. Add money - up to $1
2-13: Fluency: Addition Within 100
1. Add money - up to $1

2-14: Add Three or Four 2-Digit Addends		1. Add three numbers up to two digits each 2. Add four numbers up to two digits each Also consider: • Add three numbers up to two digits each: word problems • Add four numbers up to two digits each: word problems
2-14: Add Three or Four 2-Digit Addends
1. Add three numbers up to two digits each 2. Add four numbers up to two digits each Also consider: • Add three numbers up to two digits each: word problems • Add four numbers up to two digits each: word problems

2-15: Focus on Mathematical Practices		1. Purchases up to $2 - do you have enough money Also consider: • Skip-counting stories
2-15: Focus on Mathematical Practices
1. Purchases up to $2 - do you have enough money Also consider: • Skip-counting stories

3	Unit 3 Length and Shapes
Big Idea 1 - Length and Shapes
3-1: Measure Length		1. Measure using a centimeter ruler
3-1: Measure Length
1. Measure using a centimeter ruler

3-2: Recognize and Draw Shapes		1. Select two-dimensional shapes 2. Count sides and vertices 3. Square corners Also consider: • Equal sides
3-2: Recognize and Draw Shapes
1. Select two-dimensional shapes 2. Count sides and vertices 3. Square corners Also consider: • Equal sides

3-3: Estimate and Measure		1. Perimeter of rectangles
3-3: Estimate and Measure
1. Perimeter of rectangles

3-4: Draw, Estimate, and Measure		1. Perimeter
3-4: Draw, Estimate, and Measure
1. Perimeter

3-5: Draw Using Faces		1. Front, side, and top views 2. Name the two-dimensional shape Also consider: • Identify faces of three-dimensional shapes
3-5: Draw Using Faces
1. Front, side, and top views 2. Name the two-dimensional shape Also consider: • Identify faces of three-dimensional shapes
Big Idea 2 - Estimate, Measure, and Make Line Plots
3-6: Estimate and Measure with Centimeters		1. Which metric unit of length is appropriate? 2. Interpret line plots
3-6: Estimate and Measure with Centimeters
1. Which metric unit of length is appropriate? 2. Interpret line plots

3-7: Estimate and Measure with Inches		1. Measure using an inch ruler Also consider: • Which customary unit of length is appropriate: inches, feet, or yards?
3-7: Estimate and Measure with Inches
1. Measure using an inch ruler Also consider: • Which customary unit of length is appropriate: inches, feet, or yards?

3-8: Measure for and Make Line Plots		1. Create line plots Also consider: • Customary units of length: word problems • Metric units of length: word problems
3-8: Measure for and Make Line Plots
1. Create line plots Also consider: • Customary units of length: word problems • Metric units of length: word problems

3-9: Focus on Mathematical Practices		1. Compose two-dimensional shapes Also consider: • Find the next shape in a repeating pattern
3-9: Focus on Mathematical Practices
1. Compose two-dimensional shapes Also consider: • Find the next shape in a repeating pattern

4	Unit 4 Subtract 2-Digit Numbers
Big Idea 1 - Totals of Mixed Coins and Bills
4-1: Explore Quarters		1. Count money - up to $1 Also consider: • Add money - up to $1: word problems
4-1: Explore Quarters
1. Count money - up to $1 Also consider: • Add money - up to $1: word problems

4-2: Explore Dollars		1. Count money - up to $2 Also consider: • Equivalent amounts of money - up to $1 • Exchanging money - with pictures • Count money - up to $5
4-2: Explore Dollars
1. Count money - up to $2 Also consider: • Equivalent amounts of money - up to $1 • Exchanging money - with pictures • Count money - up to $5
Big Idea 2 - Multidigit Subtraction Strategies
4-3: Addends and Subtraction		1. How much more to make a dollar?
4-3: Addends and Subtraction
1. How much more to make a dollar?

4-4: Subtraction Word Problems		1. Subtraction word problems - up to two digits 2. Write the subtraction sentence - up to two digits
4-4: Subtraction Word Problems
1. Subtraction word problems - up to two digits 2. Write the subtraction sentence - up to two digits

4-5: Two Methods of Subtraction		1. Subtract a one-digit number from a two-digit number - without regrouping 2. Subtract a one-digit number from a two-digit number - with regrouping Also consider: • Subtract multiples of 10
4-5: Two Methods of Subtraction
1. Subtract a one-digit number from a two-digit number - without regrouping 2. Subtract a one-digit number from a two-digit number - with regrouping Also consider: • Subtract multiples of 10

4-6: Practice and Explain a Method		1. Subtract two two-digit numbers - without regrouping 2. Subtract two two-digit numbers - with regrouping Also consider: • Ways to make a number using subtraction
4-6: Practice and Explain a Method
1. Subtract two two-digit numbers - without regrouping 2. Subtract two two-digit numbers - with regrouping Also consider: • Ways to make a number using subtraction

4-7: Subtract from 200
4-7: Subtract from 200


4-8: Ungroup from the Left or from the Right		1. Subtract two-digit numbers from three-digit numbers Also consider: • Subtract a one-digit number from a three-digit number
4-8: Ungroup from the Left or from the Right
1. Subtract two-digit numbers from three-digit numbers Also consider: • Subtract a one-digit number from a three-digit number

4-9: Zero in the Ones or Tens Place
4-9: Zero in the Ones or Tens Place


4-10: Model Subtraction with Money		1. Correct amount of change - purchases up to $2 Also consider: • Subtract money - up to $1 • Least number of coins • Making change
4-10: Model Subtraction with Money
1. Correct amount of change - purchases up to $2 Also consider: • Subtract money - up to $1 • Least number of coins • Making change

4-11: Fluency: Subtraction Within 100		1. Subtract money - up to $1: word problems 2. Subtraction input/output tables - up to two digits
4-11: Fluency: Subtraction Within 100
1. Subtract money - up to $1: word problems 2. Subtraction input/output tables - up to two digits
Big Idea 3 - Word Problems: Addition and Subtraction Within 100
4-12: Word Problems with Addition and Subtraction		1. Add and subtract money - up to $1: word problems
4-12: Word Problems with Addition and Subtraction
1. Add and subtract money - up to $1: word problems

4-13: Equations with Greater Numbers		1. Fact families - up to 100
4-13: Equations with Greater Numbers
1. Fact families - up to 100

4-14: Practice Addition and Subtraction		1. Add and subtract numbers up to 100 Also consider: • Addition and subtraction - ways to make a number - up to 100 • Which sign (+ or -) makes the number sentence true?
4-14: Practice Addition and Subtraction
1. Add and subtract numbers up to 100 Also consider: • Addition and subtraction - ways to make a number - up to 100 • Which sign (+ or -) makes the number sentence true?

4-15: Buy and Sell with One Dollar		1. Add and subtract money - up to $1 2. Correct amount of change
4-15: Buy and Sell with One Dollar
1. Add and subtract money - up to $1 2. Correct amount of change

4-16: Word Problems with Unknown Addends		1. Complete the addition sentence - up to two digits
4-16: Word Problems with Unknown Addends
1. Complete the addition sentence - up to two digits

4-17: More Word Problems with Unknown Addends		1. Subtraction word problems - two two-digit numbers
4-17: More Word Problems with Unknown Addends
1. Subtraction word problems - two two-digit numbers

4-18: Start Unknown Problems		1. Complete the subtraction sentence - up to two digits 2. Write the addition or subtraction sentence - up to two digits
4-18: Start Unknown Problems
1. Complete the subtraction sentence - up to two digits 2. Write the addition or subtraction sentence - up to two digits

4-19: Compare Word Problems
4-19: Compare Word Problems


4-20: Mixed Word Problems		1. Addition and subtraction word problems - up to 100
4-20: Mixed Word Problems
1. Addition and subtraction word problems - up to 100

4-21: Two-Step Problems		1. Two-step addition and subtraction word problems - up to 100
4-21: Two-Step Problems
1. Two-step addition and subtraction word problems - up to 100

4-22: More Two-Step Word Problems		1. Addition and subtraction - balance equations - up to 100
4-22: More Two-Step Word Problems
1. Addition and subtraction - balance equations - up to 100

4-23: Focus on Mathematical Practices		1. Metric units of length: word problems
4-23: Focus on Mathematical Practices
1. Metric units of length: word problems

5	Unit 5 Time, Graphs, and Word Problems
Big Idea 1 - Time
5-1: Hours and A.M. or P.M.		1. A.M. or P.M. 2. Read clocks and write times: to the hour Also consider: • Match analog and digital clocks: to the hour
5-1: Hours and A.M. or P.M.
1. A.M. or P.M. 2. Read clocks and write times: to the hour Also consider: • Match analog and digital clocks: to the hour

5-2: Hours and Minutes		1. Match analog and digital clocks 2. Read clocks and write times Also consider: • Match digital clocks and times • Match analog clocks and times • Time words: o'clock, half, quarter
5-2: Hours and Minutes
1. Match analog and digital clocks 2. Read clocks and write times Also consider: • Match digital clocks and times • Match analog clocks and times • Time words: o'clock, half, quarter
Big Idea 2 - Picture Graphs
5-3: Discuss Picture Graphs		1. Create pictographs I Also consider: • Create pictographs II
5-3: Discuss Picture Graphs
1. Create pictographs I Also consider: • Create pictographs II

5-4: Read Picture Graphs		1. Interpret pictographs I Also consider: • Interpret pictographs II
5-4: Read Picture Graphs
1. Interpret pictographs I Also consider: • Interpret pictographs II
Big Idea 3 - Bar Graphs
5-5: Introduce Bar Graphs		1. Which bar graph is correct?
5-5: Introduce Bar Graphs
1. Which bar graph is correct?

5-6: Read Bar Graphs		1. Interpret bar graphs I 2. Interpret bar graphs II
5-6: Read Bar Graphs
1. Interpret bar graphs I 2. Interpret bar graphs II

5-7: Solve Problems Using a Bar Graph		1. Use bar graphs to solve problems Also consider: • Which table is correct?
5-7: Solve Problems Using a Bar Graph
1. Use bar graphs to solve problems Also consider: • Which table is correct?

5-8: Collect and Graph Data		1. Convert between bar graphs and tables
5-8: Collect and Graph Data
1. Convert between bar graphs and tables

5-9: Make Graphs and Interpret Data		1. Create bar graphs
5-9: Make Graphs and Interpret Data
1. Create bar graphs

5-10: Focus on Mathematical Practices		1. Create bar graphs II
5-10: Focus on Mathematical Practices
1. Create bar graphs II

6	Unit 6 3-Digit Addition and Subtraction
Big Idea 1 - Understanding Numbers to 1,000
6-1: Count Numbers to 1,000		1. Place value models - up to hundreds Also consider: • Place value - up to hundreds
6-1: Count Numbers to 1,000
1. Place value models - up to hundreds Also consider: • Place value - up to hundreds

6-2: Place Value		1. Convert between standard and expanded form Also consider: • Convert to/from a number - up to hundreds • Convert from expanded form - up to hundreds
6-2: Place Value
1. Convert between standard and expanded form Also consider: • Convert to/from a number - up to hundreds • Convert from expanded form - up to hundreds

6-3: Compare Numbers Within 999		1. Comparing numbers up to 1,000 Also consider: • Put numbers up to 1,000 in order • Greatest and least - word problems - up to 1,000
6-3: Compare Numbers Within 999
1. Comparing numbers up to 1,000 Also consider: • Put numbers up to 1,000 in order • Greatest and least - word problems - up to 1,000

6-4: Count by Ones and by Tens		1. Count forward - up to 1,000 2. Count forward by tens - up to 1,000 3. Writing numbers up to 1,000 in words - convert words to digits 4. Writing numbers up to 1,000 in words - convert digits to words Also consider: • Number lines - up to 1,000
6-4: Count by Ones and by Tens
1. Count forward - up to 1,000 2. Count forward by tens - up to 1,000 3. Writing numbers up to 1,000 in words - convert words to digits 4. Writing numbers up to 1,000 in words - convert digits to words Also consider: • Number lines - up to 1,000

6-5: Add Ones, Tens, and Hundreds		1. Add multiples of 100 Also consider: • Add multiples of 10 or 100
6-5: Add Ones, Tens, and Hundreds
1. Add multiples of 100 Also consider: • Add multiples of 10 or 100
Big Idea 2 - Adding to 1,000
6-6: 3-Digit Addition		1. Addition word problems - up to three digits 2. Write the addition sentence - up to three digits
6-6: 3-Digit Addition
1. Addition word problems - up to three digits 2. Write the addition sentence - up to three digits

6-7: Discuss 3-Digit Addition		1. Use models to add three-digit numbers - without regrouping 2. Use models to add three-digit numbers - with regrouping 3. Addition with three-digit numbers
6-7: Discuss 3-Digit Addition
1. Use models to add three-digit numbers - without regrouping 2. Use models to add three-digit numbers - with regrouping 3. Addition with three-digit numbers

6-8: Word Problems: Unknown Addends		1. Complete the addition sentence - up to three digits Also consider: • Subtraction word problems - up to three digits
6-8: Word Problems: Unknown Addends
1. Complete the addition sentence - up to three digits Also consider: • Subtraction word problems - up to three digits
Big Idea 3 - 3-Digit Subtraction
6-9: Subtract from Hundreds Numbers
6-9: Subtract from Hundreds Numbers


6-10: Subtract from Numbers with Zeros		1. Subtract across zeros 2. Subtract multiples of 10 or 100 Also consider: • Subtract multiples of 100
6-10: Subtract from Numbers with Zeros
1. Subtract across zeros 2. Subtract multiples of 10 or 100 Also consider: • Subtract multiples of 100

6-11: Subtract from Any 3-Digit Number		1. Subtract three-digit numbers - with regrouping 2. Subtract three-digit numbers - without regrouping
6-11: Subtract from Any 3-Digit Number
1. Subtract three-digit numbers - with regrouping 2. Subtract three-digit numbers - without regrouping

6-12: Practice Ungrouping		1. Subtract three-digit numbers
6-12: Practice Ungrouping
1. Subtract three-digit numbers
Big Idea 4 - 3-Digit Addition and Subtraction
6-13: Relationships Between Addition and Subtraction Methods		1. Add and subtract numbers up to 1,000 Also consider: • Complete the subtraction sentence - up to three digits
6-13: Relationships Between Addition and Subtraction Methods
1. Add and subtract numbers up to 1,000 Also consider: • Complete the subtraction sentence - up to three digits

6-14: Mixed Addition and Subtraction Word Problems		1. Addition and subtraction word problems - up to 1,000
6-14: Mixed Addition and Subtraction Word Problems
1. Addition and subtraction word problems - up to 1,000

6-15: Focus on Mathematical Practices		1. Two-step addition and subtraction word problems
6-15: Focus on Mathematical Practices
1. Two-step addition and subtraction word problems

7	Unit 7 Arrays, Equal Shares, and Adding or Subtracting Lengths
Big Idea 1 - Arrays and Equal Shares
7-1: Arrays, Partitioned Rectangles, and Equal Shares		1. Write addition sentences for arrays in two ways 2. Tile a rectangle with squares Also consider: • Identify repeated addition in arrays: sums to 10 • Write addition sentences for arrays: sums to 10 • Area
7-1: Arrays, Partitioned Rectangles, and Equal Shares
1. Write addition sentences for arrays in two ways 2. Tile a rectangle with squares Also consider: • Identify repeated addition in arrays: sums to 10 • Write addition sentences for arrays: sums to 10 • Area

7-2: Find Equal Shares		1. Make halves 2. Make thirds 3. Make fourths 4. Make halves, thirds, and fourths in different ways
7-2: Find Equal Shares
1. Make halves 2. Make thirds 3. Make fourths 4. Make halves, thirds, and fourths in different ways
Big Idea 2 - Relate Addition and Subtraction to Length
7-3: Length Word Problems and Number Line Diagrams		1. Customary units of length: word problems
7-3: Length Word Problems and Number Line Diagrams
1. Customary units of length: word problems

7-4: Add Three and Four Lengths		1. Perimeter Also consider: • Perimeter: word problems
7-4: Add Three and Four Lengths
1. Perimeter Also consider: • Perimeter: word problems

7-5: More Length Word Problems		1. Metric units of length: word problems 2. Complete the addition sentence: sums to 100
7-5: More Length Word Problems
1. Metric units of length: word problems 2. Complete the addition sentence: sums to 100

7-6: Focus on Mathematical Practices		1. Equal parts 2. Make halves, thirds, and fourths
7-6: Focus on Mathematical Practices
1. Equal parts 2. Make halves, thirds, and fourths

This document includes the IXL® skill alignments to Houghton Mifflin Harcourt's Math Expressions 2013 Common Core curriculum. IXL provides skill alignments as a service to teachers, students, and parents. The skill alignments are provided by IXL and are not affiliated with, sponsored by, reviewed, approved or endorsed by Houghton Mifflin Harcourt or any other third party. IXL® and IXL Learning® are registered trademarks of IXL Learning, Inc. All other intellectual property rights (e.g., unregistered and registered trademarks and copyrights) are the property of their respective owners.