##
* *Reflection: Perseverance
Addition and Subtraction of Integers - DOMINOES! - Section 2: Explore

Students have been struggling with the combination of addition and subtraction of integers, and this was to be expected. Today's lesson gave them more opportunities to work with the problems - and I really stepped back. Since the activity was self-checking in the sense that they were looking for a domino that had their answer on it, I tried as much as possible to put the questions back on the kids.

Students are still wanting to go changing everything in the problem, which makes me wonder whether the idea of adding the opposite (same change opposite, keep change change...) is really the way to go. This lesson afforded me the opportunity to sit and work with some of my lower students, and I had those students physically walk the number line to determine their answers. I am left to wonder if they will ever make connections - maybe I am giving them a way out instead of forcing them to understand the concept? However, I had more success with the lower kids walking the number line than I have had with the idea of adding the opposite.

*Dominoes Reflection*

*Perseverance: Dominoes Reflection*

# Addition and Subtraction of Integers - DOMINOES!

Lesson 10 of 23

## Objective: Students will be able to solve a variety of addition and subtraction problems involving two or more integers.

#### Launch

*10 min*

**Opener: **As students enter the room, they will immediately pick up and begin working on the opener. Please see my instructional strategy clip for how openers work in my classroom (**Instructional Strategy - Process for openers**). This method of working and going over the opener lends itself to allow students to construct viable arguments and critique the reasoning of others, which is **mathematical practice 3**.

**Learning Target: **After completion of the opener, I will address the day’s learning targets to the students. In today’s lesson, the intended targets are, “I can solve mathematical problems involving addition and subtraction of two or more integers.” Students will jot the learning target down in their agendas (our version of a student planner, there is a place to write the learning target for every day).

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#### Explore

*45 min*

**Dominoes Activity: **In this lesson, I am really trying to use **mathematical practice 7** - repeated reasoning, to help kids become more independent with these types of problems. Students are going to be solving addition and subtraction of integers problems using a dominoes format to check their work as they go. I am hoping that they will sense the repeated reasoning of the steps behind adding and subtracting, and thus become more fluent with the problems. In the previous lesson students relied very heavily on my assistance, so I really felt like they needed more time to work with the problems on their own before anything new was introduced to the mix. I will allow the students to work in pairs to correctly order their dominoes, but I will require all students to turn in a work paper so that all kids are held accountable for the work.

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- UNIT 1: Introduction to Mathematical Practices
- UNIT 2: Proportional Reasoning
- UNIT 3: Percents
- UNIT 4: Operations with Rational Numbers
- UNIT 5: Expressions
- UNIT 6: Equations
- UNIT 7: Geometric Figures
- UNIT 8: Geometric Measurement
- UNIT 9: Probability
- UNIT 10: Statistics
- UNIT 11: Culminating Unit: End of Grade Review

- LESSON 1: Integers and Absolute Value - Are two steps forward and two steps back the same thing?
- LESSON 2: Modeling Addition - Opposites Attract, You Know?!
- LESSON 3: Integer Addition Word Problems - Can You Picture It? (Two Day Lesson)
- LESSON 4: Adding Integers - What's the Rule?
- LESSON 5: Multiple Addends - More than 2 numbers to add?
- LESSON 6: Adding Integers Review
- LESSON 7: Adding Integers Test
- LESSON 8: Subtracting Integers - How does subtraction relate to addition?
- LESSON 9: Subtracting Integers Practice - Can you subtract more than two integers?
- LESSON 10: Addition and Subtraction of Integers - DOMINOES!
- LESSON 11: Adding and Subtracting Integers - Real World Applications
- LESSON 12: Adding and Subtracting Integers - REVIEW!
- LESSON 13: Adding and Subtracting Integers Test
- LESSON 14: Adding and Subtracting Signed Fractions - Remember Those Integer Rules!
- LESSON 15: Adding and Subtracting Signed Fractions Fluency Practice
- LESSON 16: Adding and Subtracting Signed Decimals - Line Up Those Points!
- LESSON 17: Adding and Subtracting Rational Numbers - Practice Makes Perfect!
- LESSON 18: Adding and Subtracting Rational Numbers - Test
- LESSON 19: Multiplying and Dividing Integers
- LESSON 20: Multiplying and Dividing Rational Numbers
- LESSON 21: Problem Solving with Rational Numbers
- LESSON 22: Fractions to Decimals - Terminate or Repeat?
- LESSON 23: Rational Number Unit Test