Operations and Algebra

Unit 1 PDF
Parent Letter
Learning Progressions

Unit 1 - Operations and Algebraic Thinking (September/October - 30 days)
Students develop strategies for adding and subtracting whole numbers based on their prior work with small numbers. They use a variety of models, including discrete objects and length-based models (e.g., cubes connected to form lengths), to model add-to, take-from, put-together, take-apart, and compare situations to develop meaning for the operations of addition and subtraction, and to develop strategies to solve arithmetic problems with these operations.

 

Quick Links to standards in this Unit: 1.OA.1, 1.OA.2, 1.MD.4, 1.OA.3, 1.OA.4, 1.OA.8, 1.OA.5, 1.OA.6, and 1.OA.7

Reference and Resource Books


Unit 1 AIMS Alignment Chart
CCPS Grade 1 Video References

1.OA.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Text References                    
NCTM Focus in Grade 1: pp. 38-43
TSCM: Chapter 3


Teacher Submitted Resources - Intranet Only

Discovery Education Resources 1.OA.1

(Open the Discovery Education website first)

Online Resources
Domino Writing

Lesson Seeds
Ten Frame Counters 
Combinations to 20


Lesson Plan
Word Problems within 20

Formative Assessments 





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1.OA.2 Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Text References   
NCTM Focus in Grade 1: pp. 38-43
TSCM: Chapter 3


Teacher Submitted Resources - Intranet Only

Discovery Education Resources 1.OA.2
(Open the Discovery Education website first)

Online Resources

Lesson Seeds
Three Addend Word Problems
Visit to a Restaurant

Formative Assessments

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1.MD.4 Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.

Text References                      
TSCM: pp. 310 - 321


Teacher Submitted Resources - Intranet Only

Discovery Education Resources 1.MD.4
(Open the Discovery Education website first)

Online Resources

Lesson Seeds
First Bite

Lesson Plans

Data Helps Us Answer Questions

Formative Assessments 

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1.OA.3 Apply properties of operations as strategies to add and subtract.
Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known (Commutative property of addition).
To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12 (Associative property of addition).

Text References
TSCM: Chapter 4
Basic Math Facts: Chapter 1

Teacher Submitted Resources - Intranet Only

Discovery Education Resources 1.OA.3
(Open the Discovery Education website first)

Online Resources

Lesson Seeds
Commutative Property to Add
Commutative Property with Number Lines
Associative Property to Add 3 Addends

Formative Assessments

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1.OA.4 Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8. Add and subtract within 20.

Text References                 
TSCM: Chapter 4
Basic Math Facts: Chapter 1


Teacher Submitted Resources - Intranet Only

Discovery Education Resources 1.OA.4
(Open the Discovery Education website first)

Online Resources
Think Addition Song
Addition Song MP3

Lesson Seeds
Unknown Addend

Lesson Plan
Properties of Operations to Add/Subtract





 

Formative Assessments


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1.OA.8 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.

Text References
TSCM: Chapter 4
Basic Math Facts: Chapter 1


Teacher Submitted Resources - Intranet Only

Discovery Education Resources 1.OA.8
(Open the Discovery Education website first)


Online Resources
Find the Missing Number

Lesson Seeds

Lesson Plans

Worms

Formative Assessments

 

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1.OA.5 Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

Text References
NCTM Focus in Grade 1: pp. 32-38
TSCM: Chapter 4
Basic Math Facts: Chapter 2-6


Teacher Submitted Resources - Intranet Only

Discovery Education Resources 1.OA.5 
(Open the Discovery Education website first)

Online Resources

Lesson Seeds
Frogs on a Log
Counting On
Counting by 2's


Lesson Plans

Formative Assessments                                                                   

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1.OA.6 Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9);using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Text References              
NCTM Focus in Grade 1: pp. 32-38
TSCM: Chapter 4
Basic Math Facts: Chapter 2-6


Teacher Submitted Resources - Intranet Only

 

Discovery Education Resources 1.OA.6
(Open the Discovery Education website first)


Online Resources
 

Lesson Seeds

Lesson Plans
Finding Unknown Addend Combinations

Formative Assessments








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1.OA.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.

Text References                         
NCTM Focus in Grade 1: pp. 32-38
TSCM: Chapter 4
Basic Math Facts: Chapter 2-6



Teacher Submitted Resources - Intranet Only

 

Discovery Education Resources 1.OA.7

(Open the Discovery Education website first)

Online Resources

 

Lesson Seeds
Equal Sums
Balance Equations


Lesson Plans
Block Pounds

Formative Assessments 

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