1.NBT.B.2

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- 1.NBT.B.2Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
- 1.NBT.B.3Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.

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1.NBT.B.2b

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- 1.NBT.B.2a10 can be thought of as a bundle of ten ones — called a “ten.”
- 1.NBT.B.2bThe numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
- 1.NBT.B.2cThe numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).

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## 1.NBT.B.2b

## The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.

10 Lesson(s)

### Don't Let Pigeon Drive The Bus: Concepts of 10 and Some More

1st Grade Math »
Unit: 10: A First Grader's Best Friend

1st Grade Math »
Unit: 10: A First Grader's Best Friend

Big Idea:

#### Don't let the pigeon drive the bus! Students build an understanding of numbers 11-19 as ten and some more using concrete models, all while connecting back to a well-loved story.

Standards:

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Resources
(17)

Reflections
(1)

### Counting From A Number

1st Grade Math »
Unit: Working with Numbers, Operations, and Story Problems

1st Grade Math »
Unit: Working with Numbers, Operations, and Story Problems

Big Idea:

#### Students will continue working with games that ask them to use the counting on strategy. The lesson will end with a story problem that allows for the students to use the counting on strategy in a real world situation.

Standards:

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(9)

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(19)

Reflections
(1)

### Numbers in the Teens

1st Grade Math »
Unit: 10: A First Grader's Best Friend

1st Grade Math »
Unit: 10: A First Grader's Best Friend

Big Idea:

#### Students use base ten models to create numbers in the teens, and sing while they do it!

Standards:

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(13)

Resources
(15)

Reflections
(1)

### Loading the Bus: Decomposing Teen Numbers

1st Grade Math »
Unit: 10: A First Grader's Best Friend

1st Grade Math »
Unit: 10: A First Grader's Best Friend

Big Idea:

#### Students have spent time building the numbers 11-19. This lesson gives them the opportunity to go at it from the other direction, taking the numbers and breaking them apart into a ten and some extra.

Standards:

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(15)

Resources
(17)

Reflections
(1)

Big Idea:

#### This is stage one for my class to begin developing place value. This lesson will use numbers in the teens to learn that numbers are made up of tens and ones.

Standards:

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(3)

Resources
(18)

Reflections
(1)

### End of Unit Assessment

1st Grade Math »
Unit: Complements of 10 and 20

1st Grade Math »
Unit: Complements of 10 and 20

Big Idea:

#### Today's lesson will allow you to see how your students have developed with their understanding of groupings, complements of 10 and 20 and how fluently they can add and/or subtract within 10.

Standards:

Resources
(16)

Reflections
(1)

Big Idea:

#### My students have learned numbers 11-20 are made up of tens and ones. Now they will use these numbers and identify the set of tens and ones in each number.

Standards:

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(3)

Resources
(19)

Reflections
(1)

Big Idea:

#### We are walking up the staircase of complexity and practicing constructing numbers from tens and ones in this lesson.

Standards:

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(3)

Resources
(20)

Reflections
(2)

### Understand Tens and Ones

1st Grade Math »
Unit: Numbers and Place Value

1st Grade Math »
Unit: Numbers and Place Value

Big Idea:

#### Math Counts! In this lesson students will use models to represent tens and ones.

Standards:

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(5)

Resources
(13)

Reflections
(1)

### Make Tens and Ones

1st Grade Math »
Unit: Numbers and Place Value

1st Grade Math »
Unit: Numbers and Place Value

Big Idea:

#### Let’s make tens and ones! In this lesson students begin to transition from using manipulatives to represent tens and ones to drawing a quick picture.

Standards:

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(3)

Resources
(13)

Reflections
(1)

Common Core Math

### Kindergarten

### First Grade

### Second Grade

### Third Grade

### Fourth Grade

### Fifth Grade

### Sixth Grade

### Seventh Grade

### HS Number & Quantity

### HS Algebra

### HS Functions

### HS Geometry

### Kindergarten

### First Grade

### Second Grade

### Third Grade

### Fourth Grade

### Fifth Grade

### Sixth Grade

### Seventh Grade

### Eighth Grade

### Ninth and Tenth Grade

### Kindergarten

### First grade

### Second grade

### Third Grade

### Fourth grade

### Fifth grade

### Middle School

Kindergarten

First Grade

Second Grade

Third Grade

Fourth Grade

Fifth Grade

Sixth Grade

Seventh Grade

HS Number & Quantity

HS Algebra

HS Functions

HS Geometry

Kindergarten

First Grade

Second Grade

Third Grade

Fourth Grade

Fifth Grade

Sixth Grade

Seventh Grade

Eighth Grade

Ninth and Tenth Grade

Kindergarten

First grade

Second grade

Third Grade

Fourth grade

Fifth grade

Middle School