# Modeling Teen Numbers

## Overview

This lesson will allow students to explore building numbers 10-19 with tens and ones on a virtual math manipulative website, then paste their models in a Google Slides assignment.

Image credit: Britta Nunley, created using a template in Canva

# Summary

This lesson will help students explore models of teen numbers using virtual math manipulatives. There is a Google Slides assignment that includes all numbers 10-19. Virtual manipulatives will be used to model each number. Time to complete all pages will be best done in 2-3 20-30 minute sessions.

Face-to-face learning

- Each student will have their devices with the virtual math manipulatives website and the Google Slides assignment open. As they work, the teacher will walk around, asking guiding questions, and choosing students to share their solutions.

Blended learning

- Students can learn about the virtual math manipulatives and pasting screenshots into their assignments during a whole class or small group lesson. The assignment can be started during independent work time. Debriefing can happen during small group or whole class instruction.

Virtual synchronous learning

- Students can learn about the virtual math manipulatives and pasting screenshots into their assignments during a virtual lesson. The assignment can be started during independent work time. Debriefing can happen during the next virtual lesson.

# Background for Teachers

To teach this lesson, you will need to spend some time familiarizing yourself with joining and separating ten sticks with the virtual math manipulatives of your choice. Take some time to familiarize yourself with the tool. The main lesson provides two possible tools. To help you get started, you can watch the following videos:

- BrainingCamp (subscription needed, author preferred tool): https://app.brainingcamp.com/tutorials, click on Base Ten Blocks
- Polypad (free): https://mathigon.org/task/tutorial-numbers, scroll down to Number Tiles

The Google Slides assignment has links to both tools on the first slide. You will want to edit this slide before assigning it to your students. Delete the link you don't need, or edit one to match the tool of your choice.

# Step 1 - Goals and Outcomes

Learning Intentions:

- Students will be able to understand that teen numbers are made up of one group of ten and some ones.

Success Criteria:

- Students will be able to create a virtual model of a teen number with a virtual math manipulative, copy the model, and paste it into a Google Slide assignment.

# Step 2 - Planning Instruction

**Student Background Knowledge**

- Prior to this lesson, students will need to be able to rote count through at least 19. You can have your class count from 1 to 20 together and state that you will be working with the numbers that come after 10.

**Strategies for Diverse Learners**

- Students who need it can use a 100 chart or have the teacher help them count as needed.
- Students who struggle with computer skills can use physical manipulatives, but may miss out on the benefits that come from the visual of the group of ten joining together.

# Step 3 - Instruction

- If students have never used the virtual manipulatives you have chosen, you will want to show them the basics including adding and moving blocks, deleting blocks, combining and separating groups of ten, and clearing the screen (See suggested manipulatives in Background for Teachers).
- Have students open the virtual manipulatives website and the Google Slides assignment:
- Have students model the number on slide 2 any way they choose using the virtual manipulatives.
- You might expect to see some of the following models for the number 13. All are acceptable.
- 13 ones
- 13 ones and then the student groups ten together
- One group of ten and three ones

- You might expect to see some of the following models for the number 13. All are acceptable.
- Ask 2-3 students to describe how they created their model, starting with the most basic up to the most complex. This will help students who used more basic models start to see how to do more complex ones as they are ready. Encourage students to use math terms in their descriptions like "ten" and "ones". Help students see the connection between the model and the digits.
- Show students how to do a screenshot of their model and paste it onto the Google slide
- Chromebook: Ctrl-Shift-Window switcher

- Have a brief discussion about appropriate and inappropriate uses of screenshots (this discussion should happen during multiple lessons throughout the year).
- Students will go back and forth between the Google Slide assignment and the virtual manipulative website until each slide has a virtual model.
- As appropriate, encourage students who only use ones to figure out a way to use a group of ten, and others to start with a group of ten instead of starting with all ones and joining them after. Students do not all need the most complex model by the end of this lesson.
- Debrief the assignment and have students explain their thinking as they completed the models. Have them explain what they notice on the slides about the numbers and the models they created.

# Step 4 - Assessments

Student Self Rating

- Slide #12 of the Google Slides assignment has a student rating.
- Have students go to this slide at the end of the lesson, even if they didn't complete each slide.
- Students will double-click in the box below the rating they want to give, then type an "x".

Teacher Scoring

- Slide #13 of the Google Slides assignment has a rubric.
- To mark a box, place your cursor in the box, then change the fill color (paint bucket icon).
- Use the information from the rubric results to plan instruction moving forward.
- Do students need more instruction and practice with models?
- Are students ready to work on another skill like drawing their own models or counting from a model?