Teen Numbers Unit | 1st Grade Small Group Math Intervention

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First graders are meant to build upon their understanding of teen numbers and place value. It is assumed that first grade students have a strong understanding of teen numbers from kindergarten but that is not always the case. This intervention unit is designed to help first grade students build the foundation they will need to be successful through the remainder of the school year.

Click HERE to save 20% on the full year intervention lesson bundle. This comprehensive bundle includes all of your intervention instruction, assessment and independent practice for the entire school year!

Need the flexibility to teach digitally or face-to-face? This unit can also be purchased as a DIGITAL & PRINTABLE resource so that you can seamlessly switch between in-person and online teaching.

Strategies for building number sense with teen numbers include hands on concrete learning on double ten frames, moves towards representative models and ends with application in word problems. Along the way students will connect their learning to number bonds and equations so that they are able to generalize this learning on future math topics.

This intervention resource is designed to support you with everything you will need in order to intervene for struggling learners who have net yet learned to compare two digit numbers in the whole group setting with their peers.

Included you will find:

Overview and Organization

The 5 Day Focus resources are designed to be informative and easy to use. I have included an overview of the related standards, an outline organizing the breakdown of how the topic is taught, a table of contents and a page outlining any and all materials that will be needed. I want you to be able to spend your time and energy on looking at your students results and reflecting on their learning- NOT on organizing materials and trying to figure out how to use this resource!


Pre and Post Assessment Materials that mirror one another will allow you to see where your students began and how far they have progressed. I have also included daily exit tickets and a tracking form so that you can easily monitor each of your students. 

Direct Instruction

Instructional lesson activities to use with small groups or individual students. Each of these lessons is detailed and includes hands-on activities. There is gradual release across the 5 days beginning with more concrete models and moving away towards representative and, finally, abstract models. This research based progression will surely help your students to progress. 

Independent Centers

Each of the 5 lessons also includes an independent practice activity. The independent activities have been created in the style of math centers so that they can be used directly after the instructional lesson but so they can also be used and re-used as students practice their skills.

Total Pages
45 pages
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to see state-specific standards (only available in the US).
The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
10 can be thought of as a bundle of ten ones - called a “ten.”
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:


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