Topic+One

= Topic One: Fluently Add and Subtract Within 20 = Pacing (Duration of Unit): 1. Make sense of problems and persevere in solving them. 2. Reason abstractly quantitatively. 3. Construct viable arguments and critique the reasoning of others. 4. Model with mathematics. 5. Use appropriate tools strategically. 6. Attend to precisions. 7. Look for and make use of structure. 8. Look for and express regularity in repeated reasoning. ||
 * ~ = Desired Results = ||
 * __**Transfer:**__
 * __**Established Goals:**__
 * 2.OA.1** Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by sung drawings and equations with a symbol for the unknown number to represent the problem.


 * 2.OA.2** Fluently add and subtract within 20 using mental strategies. Be end of Grade 2 know from memory all sums of two-digit numbers.


 * __Student I Can Statements:__**
 * I can choose use strategies to solve addition word problems. (within 100)
 * I can use strategies to solve subtraction word problems. (within 100)

__**Prerequisite Standards:**__ 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.

1.OA.2 Fluently add and subtract within 20 using mental strategies. By end of grade 2, know from memory all sums of two one-digit numbers.

1.OA.3 ||
 * __**Big Ideas:**__

Numbers can have used for different purposes, and numbers can be classified and represented in different ways.
 * Number Uses, Classification, and Representation**

The set of real numbers is infinite and ordered. Whole numbers, integers, and fractions are real numbers. Each real number can be associated with a unique point on the number line.
 * Numbers and the Number Line**

Any number, measure, numerical expression, algebraic expression, or equation can be represented in an infinite number of ways that have the same value.
 * Equivalence**


 * Patterns, Relations, and Functions**-Relationships can be described and generalizations made for mathematical situations that have numbers or objects that repeat in predictable ways. For some relationships, mathematical expressions and equations can be used to describe how members of one set are related to members of a second set.

Mathematics content and processed can be applied to solve problem. || **__Essential Questions:__**
 * Practices, Processes, and** **Proficiencies**
 * What are strategies for finding addition and subtraction facts? ||
 * __**Students will know...**__
 * Counting on is a strategy that can be used to find sums. The order of the addends does not change the sum.
 * basic addition facts that are near doubles can be found using a related doubles fact.
 * some addition facts can be found by changing to an equivalent fact with 10.
 * patterns in a 0-10 addition facts table are useful for adding numbers and for developing mental math strategies and number sense.
 * a number line is a tool you can use to help you count on or count back to subtract.
 * addition and subtractions have an inverse relationship. The inverse relationship between addition and subtraction facts; every subtraction fact has a related addition fact.
 * some subtraction facts can be simplified by making use of the numbers' relationships to 10.
 * the addends determine efficient strategies, such as making 10 or using doubles fact, for finding addition facts. "Think of a related addition fact" is an efficient strategy for finding a subtraction fact.
 * objects, diagrams, and equations can help you solve different types of word problems.
 * good math thinkers use math to explain why they are right. They can talk about the math that others do, too.

__**Vocabulary:**__ equation addends sum doubles near doubles difference || __**Students will be skilled at...**__ > using words, pictures, numbers, and symbols. ||
 * counting on to add numbers and add numbers in any order.
 * applying doubles and near doubles to add quickly and accurately
 * adding quickly and accurately using the strategy of making a ten.
 * applying number patterns on an addition facts table to complete related additional equations that show basic facts.
 * counting on and count back on a number line to subtract.
 * thinking addition to subtracting quickly and accurately.
 * creating a 10 to subtract quickly.
 * adding and subtracting quickly and accurately using mental math strategies.
 * solving word problems addition and subtraction.
 * constructing viable math arguments


 * ~ = Assessment Evidence = ||
 * **Performance Assessment:**

|| **Other Evidence:**


 * Formative Assessments:**

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 * ~ = Learning Plan = ||
 * __**Learning Activities:**__


 * 1-1 Addition Fact Strategies-**Use counting on to add numbers and add numbers in any order.


 * 1-2-Doubles and Near Doubles-**Use doubles and near doubles to add quickly and accurately.


 * 1-3-Make a 10 to Add-**Use the strategy of making a ten to add quickly and accurately.


 * 1-4-Addition Fact Patterns-**Use number patterns on an addition facts table to complete related addition equations that show basic facts.


 * 1-5-Count On and Count Back to Subtract-**Count on and count back on a number line to subtract.


 * 1-6-Think Addition to Subtract-**Think addition to subtract quickly and accurately.


 * 1-7-Make a 10 to Subtract-**Make a 10 to subtract quickly and accurately.


 * 1-8-Practice Addition and Subtraction Facts-** Add and subtract quickly and accurately using mental math strategies.


 * 1-9-Solve Addition and Subtraction Word Problems-**Use addition and subtraction to solve word problems.


 * 1-10-Construct Arguments-Use words, pictures, numbers, and symbols to construct viable math arguments.** ||
 * __**Resources:**__


 * Student Resources:**


 * Partner Games:**

[|Alien Addition] [|Rule It Out]
 * Online Game:**

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 * Student Activity:**