Standard 1 : Work with numbers 11–19 to gain foundations for place value. (Major Cluster) (Archived)



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Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

General Information

Number: MAFS.K.NBT.1
Title: Work with numbers 11–19 to gain foundations for place value. (Major Cluster)
Type: Cluster
Subject: Mathematics - Archived
Grade: K
Domain-Subdomain: Number and Operations in Base Ten

Related Standards

This cluster includes the following benchmarks
Code Description
MAFS.K.NBT.1.1: Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.


Related Access Points

This cluster includes the following access points.

Access Points

Access Point Number Access Point Title
MAFS.K.NBT.1.AP.1a: Identify the value of a base ten block and ones block to build representations of 11-15.


Related Resources

Vetted resources educators can use to teach the concepts and skills in this topic.

Educational Software / Tool

Name Description
Hundreds Chart:

A printable hundreds chart featuring a 10x10 table numbered 1 to 100. (found on Illuminations website under "Trading for Quarters")

Formative Assessments

Name Description
Ten Ones and Some Other Ones:

Students use cubes to make a set of 10 ones and other ones to represent the number 17 and then write an equation or draw a picture that reflects this decomposition.

Make Tens and Ones:

Students use a ten frame to decompose 12 into tens and ones.

Decomposing 15:

Students are asked to break 15 into a group of 10 and some further ones.

Composing 13:

Students are asked to compose 13 by using a group of 10 and some other ones.

Lesson Plans

Name Description
How many MORE ones than ten?:

Students will review the procedure for using a ten-frame. Students will be introduced to the important foundational concept for place value that numbers 10-20 can be represented as a unit of tens and a group of ones. Students will practice subitizing skills (the ability to "instantly see how many") using a ten-frame and counters.

Working with Teen Numbers:

This lesson uses manipulatives, drawings, expressions and equations to provide understanding of the composition of teen numbers as a unit of ten and a group of ones.

Fireflies - Numbers 11-19:

In this lesson, students will manipulate beans (fireflies) to represent numbers 11-19 as a unit of ten and a group of ones.

Decompose That Teen Number!:

The students will receive explicit instruction from the teacher on the definition of decomposing a number and how to represent a decomposition with manipulatives, drawings, and equations. The students will use linking cubes to reflect numbers from 11-19, and to show their understanding of how to decompose a number. Students will record decompositions as an equation.

Ten and Some More (Exploring Numbers 11-20):

In this lesson, students will represent numbers 11-19 using a unit of ten and a group of ones using objects. As an optional extension task, students will be challenged to use their knowledge of numbers 11-20 represented as a unit of ten and a group of ones to complete posters in a mock real-world situation involving free tickets.

Presentation/Slideshow

Name Description
Regroup Ones as Tens:

This quick slide show demonstrates for students how to use base ten blocks to regroup, trade, or change groups of 1's into 10's. When you have more than 10 ones base ten blocks, students should regroup or change, 10 ones to 1 ten. User clicks through the slides.



Student Resources

Vetted resources students can use to learn the concepts and skills in this topic.

Educational Software / Tool

Title Description
Hundreds Chart:

A printable hundreds chart featuring a 10x10 table numbered 1 to 100. (found on Illuminations website under "Trading for Quarters")



Parent Resources

Vetted resources caregivers can use to help students learn the concepts and skills in this topic.

Educational Software / Tool

Title Description
Hundreds Chart:

A printable hundreds chart featuring a 10x10 table numbered 1 to 100. (found on Illuminations website under "Trading for Quarters")