Teaching the Number and Operations in Base 10 Common Core Kindergarten Math Unit is trickier than it appears! This Common Core Domain technically only has ONE standard:

Work with numbers 11-19 to gain foundations for place value.

Essentially, it is teaching place value and teen numbers.  We want students to learn that teen numbers can be made with a group of ten (ones), plus some extra ones.  It is a fun math unit that I enjoy teaching, but those teen numbers can be tricky!

Try a few FREEBIES from this math unit  throughout this post! I hope you enjoy them as much as we do.

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Our kindergarten didn't have a math curriculum that aligned with the common core standards.

I set out looking for one, but could never find units that included pre/post tests (required that we give these in my district), worksheets, no prep activities, math centers, and standards checklists (for me and parents.)

There are 5 Kindergarten Common Core Math Domains.  Included in these units are everything you need to teach the standards throughout your school year!

Counting and Cardinality

Operations and Algebraic Thinking


Measurement and Data

Number and Operations in Base 10

In late winter/early spring, we tackle our Number and Operations in Base 10 math unit.  In this unit we learn about all about place value and those tricky teen numbers!

I did my best to organize this unit as I do all my math units – so it is easy for you to implement and use.  

I keep my math units in three-ring binders.  I use page protectors to keep my lessons and black lines organized - no more filing cabinets to dig through!  


I love this because it keeps my papers nice and smooth, and it is so easy to flip through and see what I have to grab exactly what I need.  


CCSS.MATH.CONTENT.K.NBT.A.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 (such as 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.


This is a peek at what I use for pre/post tests for this unit.  The pre and post tests are pretty much exactly the same, but the numbers, pictures, etc. are different.  This will give you accurate data for growth.I also send home standards checklists to parents so they have a heads-up as to what we are working on in math. I do this before all of my math units.  This way there are no surprises at report card time and parents can help at home.  These are great to slip in my lesson plan binders too!


Since there is only one common core standards in this unit, two sheets can print per page (other units make up a whole page.)I have found that they key to success with this unit is practice, practice, practice.

I use a variety of approaches and techniques so my students are exposed to the vocabulary and strategies for solving these problems over and over again.   It is easy for them to mix up terms such as tens, ones, teens, etc. … so we do lots of hands-on activities and reinforcement worksheets to help them understand.


A peek at the worksheets and NO PREP activities

We have been using ten frames and number lines all year, so my students are familiar with how to use them.

I start the unit by simply having them practice making teen numbers.  We find the number on the number line, fill in the ten frames and then move on to JUMPING on number lines.


We start at ten and "hop" up.  This is an awesome activity for visual learners because they see the frog, bunny, leprechaun and spider jumping to a teen number.  The whole idea of ten+ones makes sense to them this way.Another way we practice making teen numbers from ten ones + additional ones is counting how many objects.  Your higher kids will pick up on the fact that the first group always has ten on these worksheets, so really they just have to count the second set (cupcakes, bees, gum balls.)


Same with the ten frames - we want students to recognize that they don't actually have to count the full ten frames.We know this group has ten.  I want my kids to count like this, "10, 11, 12, 13" instead of having to start at one.We always love the cut and paste activities.  This always helps to keep my busy kiddos engaged.  Practicing one more/one less with teen numbers along with ordering teen numbers is always needed practice.

Teaching place value to five and six year olds is tricky to say the least!

Try this FREEBIE!


The worksheets and activities help my students tremendously.  They need the repetitive practice, and even better they really love these activities!  These help me stay organized so I know I am hitting all the standards.  Keep these activities in page protectors too!We also do mini warm ups most days with these math journals.

These are all about getting students to practice place value and teen numbers.  There are two different ways I scaffold this  - and you can try each one for FREE!



I start with with the pages that show students a ten stick and extra ones, and then once they get the hang of this they have to draw their one ten stick and extra ones

A peek at our Math Centers for Number and Operations in Base 10


These activities are so engaging for students…. it is always fun when they forget that they are learning.SIX different centers are included, and you can even print one for FREE to try with your students.


Use with or without the coordinating recording sheet.


So many ways to play.


Use dry erase makers with the laminated cards, and then they fill out their recording sheet.


Hang the adorable teen number posters at this center and students can reference them while filling out their teen books.

Try a math center for FREE!



Ready to get going on this Number and Operations in Base 10 unit?! You and your students will have so much fun with these standards!

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Grab this complete unit HERE


Save money with the Kindergarten Math BUNDLE HERE

I have math units available for all the Kindergarten Common Core domains!

CLICK HERE to see them in action and try FREEBIES from each unit!

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