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- 1.NBT.B.2a10 can be thought of as a bundle of ten ones â called a âten.â
- 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).

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

1st Grade Math

Â» 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.

Counting From A Number

1st Grade Math

Â» 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.

Loading the Bus: Decomposing Teen Numbers

1st Grade Math

Â» 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.

Numbers in the Teens

1st Grade Math

Â» 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!

Building Numbers 11-20

1st Grade Math

Â» Unit:

Place Value

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.

End of Unit Assessment

1st Grade Math

Â» 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.

Using Numbers 11-20

1st Grade Math

Â» Unit:

Place Value

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.

Making Numbers

1st Grade Math

Â» Unit:

Place Value

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

Understand Tens and Ones

1st Grade Math

Â» Unit:

Numbers and Place Value

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

Make Tens and Ones

1st Grade Math

Â» Unit:

Numbers and Place Value

Big Idea:Letâs make tens and ones! In this lesson students begin to transition from using manipulatives to represent tens and ones to drawing a quick picture.

1.NBT.B.2a

10 can be thought of as a bundle of ten ones â called a âten.â

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.

1.NBT.B.2c

The 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).