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Open Up Resources K–5 Math
Grade 1
Kindergarten
Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Units
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Contents
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Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Grade 1
Google Slides
Unit 1: Adding, Subtracting, and Working With Data
Community Created Resources
Lesson 1
: Count and Add
Lesson 2
: Explore Expressions and Sums
Lesson 3
: Add 1 or 2
Lesson 4
: More Work with 1 and 2
Lesson 5
: Explore Addition and Subtraction
Lesson 6
: Center Day 1
Lesson 7
: Sort Math Tools
Lesson 8
: Sort and Count Shape Cards
Lesson 9
: What is Your Favorite _______ ?
Lesson 10
: Center Day 2
Lesson 11
: Class Pet Surveys
Lesson 12
: How Many?
Lesson 13
: Questions About Data
Lesson 14
: Center Day 3
Lesson 15
: Animals in the Jungle
Unit 2: Addition and Subtraction Story Problems
Community Created Resources
Lesson 1
: Story Problems and Expressions
Lesson 2
: Story Problems and Equations
Lesson 3
: A Change is Coming
Lesson 4
: Result or Change Unknown
Lesson 5
: Center Day 1
Lesson 6
: Problems About Pets
Lesson 7
: Shake and Spill
Lesson 8
: Shake, Spill, and Cover
Lesson 9
: Compare Story Problems
Lesson 10
: Center Day 2
Lesson 11
: Make Them the Same
Lesson 12
: School Supplies
Lesson 13
: Compare Favorite Art Supply Data
Lesson 14
: Compare With Addition and Subtraction
Lesson 15
: Different Types of Story Problems
Lesson 16
: Center Day 3
Lesson 17
: How Do the Stories Compare?
Lesson 18
: Equations With Unknowns
Lesson 19
: Story Problems and Equations
Lesson 20
: What’s the Story?
Lesson 21
: Center Day 4
Lesson 22
: Story Problems and Equations
Unit 3: Adding and Subtracting Within 20
Community Created Resources
Lesson 1
: Sums I Know
Lesson 2
: Relate Counting to Addition
Lesson 3
: Are the Expressions Equal?
Lesson 4
: Sums of 10
Lesson 5
: Find the Difference
Lesson 6
: Story Problems Within 10
Lesson 7
: Center Day 1
Lesson 8
: Ten as a Unit
Lesson 9
: Addition With a Ten
Lesson 10
: Addition and Subtraction With a Ten
Lesson 11
: Add to a Teen Number
Lesson 12
: Subtract From a Teen Number
Lesson 13
: More Story Problems With Teen Numbers
Lesson 14
: Center Day 2
Lesson 15
: Solve Story Problems With Three Numbers
Lesson 16
: Add Three Numbers
Lesson 17
: Make 10 to Add
Lesson 18
: Patterns in Addition
Lesson 19
: Methods for Addition Within 20
Lesson 20
: A Trip to the Zoo
Lesson 21
: Center Day 3
Lesson 22
: Subtract From Teen Numbers
Lesson 23
: Use a Ten to Subtract
Lesson 24
: Relate Counting to Addition and Subtraction
Lesson 25
: How Do You Want to Subtract?
Lesson 26
: What’s the Story?
Lesson 27
: Center Day 4
Lesson 28
: Around the Room
Unit 4: Numbers to 99
Community Created Resources
Lesson 1
: Count Large Collections
Lesson 2
: Match Representations of Tens
Lesson 3
: Addition and Subtraction with Tens
Lesson 4
: More Addition and Subtraction with Tens
Lesson 5
: Center Day 1
Lesson 6
: Count Larger Collections
Lesson 7
: Numbers With Tens and Ones
Lesson 8
: Different Representations of Tens and Ones
Lesson 9
: Show Me Your Number
Lesson 10
: Write Two-digit Numbers
Lesson 11
: Add Tens to Two-digit Numbers
Lesson 12
: Mentally Add and Subtract Tens
Lesson 13
: Center Day 2
Lesson 14
: Let’s Compare
Lesson 15
: Greater Than, Less Than
Lesson 16
: Write Comparisons with Symbols
Lesson 17
: Compare and Order Numbers
Lesson 18
: Center Day 3
Lesson 19
: Make Two-digit Numbers
Lesson 20
: Make Two-Digit Numbers in Different Ways
Lesson 21
: Compare Two-Digit Numbers Shown in Different Ways
Lesson 22
: Center Day 4
Lesson 23
: Two-Digit Numbers in Our World
Unit 5: Adding Within 100
Community Created Resources
Lesson 1
: Add Tens or Ones
Lesson 2
: How Did You Add?
Lesson 3
: Add It, Explain It
Lesson 4
: Center Day 1
Lesson 5
: Make a Ten
Lesson 6
: Make a Ten and Make Sense of Equations
Lesson 7
: Does it Make a New Ten?
Lesson 8
: Center Day 2
Lesson 9
: Add 2 Two-digit Numbers
Lesson 10
: Tens and Tens, Ones and Ones
Lesson 11
: How Did You Do That?
Lesson 12
: Add it Up
Lesson 13
: Center Day 3
Lesson 14
: Food Drive
Unit 6: Length Measurements Within 120 Units
Community Created Resources
Lesson 1
: Compare Lengths
Lesson 2
: Compare the Length of Objects Indirectly
Lesson 3
: Choose Objects to Compare Length Indirectly
Lesson 4
: Center Day 1
Lesson 5
: Measure with Connecting Cubes
Lesson 6
: Measure with Paper Clips
Lesson 7
: Measure Length with Different Length Units
Lesson 8
: Groups Up to 110
Lesson 9
: Write Numbers to 120
Lesson 10
: Center Day 2
Lesson 11
: How Long Are Our Shoes?
Lesson 12
: Compare Measurements
Lesson 13
: Solve Take From Story Problems
Lesson 14
: Which Equation Matches?
Lesson 15
: Write Equations for Story Problems
Lesson 16
: Center Day 3
Lesson 17
: Puppies and Tulips
Unit 7: Geometry and Time
Community Created Resources
Lesson 1
: Shapes That Are Solid
Lesson 2
: Build Shapes from Other Shapes
Lesson 3
: Shapes That Are Flat
Lesson 4
: Draw Flat Shapes
Lesson 5
: Some Triangles, All Triangles
Lesson 6
: Rectangles and Squares
Lesson 7
: Put Together Flat Shapes
Lesson 8
: Center Day 1
Lesson 9
: Equal Pieces
Lesson 10
: One of the Pieces, All of the Pieces
Lesson 11
: A Bigger Piece
Lesson 12
: Center Day 2
Lesson 13
: It’s Time to Learn About Clocks
Lesson 14
: Half of the Clock
Lesson 15
: Write Times
Lesson 16
: Hard Times
Lesson 17
: Center Day 3
Unit 8: Putting It All Together
Community Created Resources
Lesson 1
: Addition Fluency Within 10
Lesson 2
: Relate Addition and Subtraction
Lesson 3
: Add and Subtract Within 20
Lesson 4
: Change Unknown Story Problems
Lesson 5
: Put Together and Take Apart Story Problems
Lesson 6
: Compare Story Problems
Lesson 7
: Count Large Collections
Lesson 8
: Show Me All the Ways
Lesson 9
: Solve Number Riddles
Lesson 10
: Write Number Riddles
