Task Teacher Guide
Be sure to read the teacher guide prior to running the task. When you’re ready to run the task, use the tabs at the top of the page to navigate through the lesson.
In This Task…
Students will calculate the height of bears given various percentages of a base bear utilizing various strategies that build fluency in solving proportions.Â
Intentionality…
In this task, students will explore strategies to determine percentage values. They will make use of a double number line and benchmark percentages like 50%, 25%, 10%, 1% and multiplicative relationships to determine heights of various bears. Some of the big ideas that may emerge through this task include:
- Percent is a ratio.Â
- Percent is a comparison measured out of 100;
- A rate can be helpful to determine percentage values.
Spark
What Do You Notice? What Do You Wonder?
Show students the following video:
Then, ask students:
What do you notice?
What do you wonder?
Give students 60 seconds (or more) to do a rapid write on a piece of paper.
Then, ask students to share with their neighbours for another 60 seconds.
Finally, allow students to share with the entire group.
Some of the noticing and wondering that came up in a class recently included:
- I notice a variety of bears..Â
- Some bears are shorter than the main bear and some are taller.Â
- I wonder how tall these bears are?
- I wonder how these bears relate to math class?Â
- Are any bears the same height?
Estimation: Prompt
Sense Making
Crafting A Productive Struggle: Prompt
Since you have already taken some time to set the context for this problem and student curiosity is already sparked, we have them in a perfect spot to help push their thinking further and fuel sense making.
Share the following silent animation.
You can verbally share the following prompt with students:
Determine the height of each bear shown in this image.Â
During Moves
While Students Are Productively Struggling…
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Student Approach #1: Benchmark Comparisons & Counting Up
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Student Approach #2: Scaling in Tandem to 100
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Student Approach #3: Using Equivalent Ratios
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Student Approach #4: Making Use of Unit Rates
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Next Moves
Consolidation: Making Connections
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Reveal
Reflect
Provide students an opportunity to reflect on their learning by offering these consolidation prompts to be completed independently.
Consolidation Prompt #1:
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Consolidation Prompt #2:
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
We suggest collecting this reflection as an additional opportunity to engage in the formative assessment process to inform next steps for individual students as well as how the whole class will proceed.
Download Editable/Printable Handout
Become a member to access purposeful practice to display via your projector/TV, download the PDF to upload to your LMS and/or print for students to have a physical copy
Resources and Downloads
Lesson Tip Sheet
Download the lesson plan in PDF format so you can keep it handy and share with colleagues.
Videos & Images
Download the videos, images, and related media files to your computer to avoid streaming.
Keynote Slides
Download in Apple Keynote format to avoid streaming video and run the lesson smoothly.
PowerPoint Slides
Download in Microsoft PowerPoint format to avoid streaming video and run the lesson smoothly.
Printable Handout
Download/Edit the handout so you can keep it handy and share with colleagues.
Explore The Entire Unit of Study
This Make Math Moments Task was designed to spark curiosity for a multi-day unit of study with built in purposeful practice, and extensions to elicit and emerge mathematical models and strategies.
Click the links at the top of this task to head to the other related lessons created for this unit of study.
Consolidation Prompt #1
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Consolidation Prompt #2
Login/Join to access the entire Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem based units.
Download Editable/Printable Handout
Become a member to access purposeful practice to display via your projector/TV, download the PDF to upload to your LMS and/or print for students to have a physical copy