Interactive Math Activity - Estimate the Number of Bears

 
Which set should I use?
 
“Esti-Mysteries are already working well for my class.”
 
Use slides 2-7 if Esti-Mysteries are already working well for you.  
These slides are exactly the same with no
changes.  You’re students already have a way of writing down their estimates and are responding to each
clue.  They may be using a digital platform to record their thinking, or are writing on paper, or are using a dry
erase board or chart – or they have another way of responding to clues in writing.  You probably already
notice that when students write down their estimate after each clue that it helps to propel rich math talk
and also builds anticipation for the next clue.  If this sounds familiar, then I recommend using slides 1-6.
 
FURTHER OPTIONS FOR DISTANCE LEARNING
 
“I need a chart for everyone to see, and I have a way to digitally write on it.”
 
Use slides 8-13 if you simply need an embedded chart to write on during discussion. This may be particularly
useful for distance learning if students do not have easy access to a chart.  Perhaps they don’t have a chart
at home, or they may not be able to easily navigate between tabs to a digital chart.  You can use a digital pen
(such as a drawing feature) to record ideas from student discussions and cross out numbers for the whole
class to see at the same time.
 
“I need a step-by-step animated chart that eliminates numbers after every clue.”
Use slides 14-19 if you want to see numbers disappear from the chart after every clue.  This may be helpful if
you need a chart and don’t have an easy way to digitally write on the chart.  You can move forward and
backward to see which clues eliminated which numbers.
Watch this YouTube video for more
information about the charts.
“More Than a Square Bear”
Important Note:
If you can see this box, then the slide show is
not playing and the reveal won’t work.
Here is the solution:
If you are using PowerPoint, click on Slide
Show, then click on From Current Slide.
If you are using Google Slides, click on View
then Present.
Steve Wyborney
As the clues appear, use the
information to narrow the
possibilities to a smaller set.  After
each clue, use estimation again to
determine which of the remaining
answers is the most reasonable.
How many bears are in the glass?
Write down your first estimate.
After each clue, you’ll see if your
estimate is still a possibility.  After
each clue, if it is no longer possible
write down a new estimate – and
be prepared to explain why you
chose it.
www.stevewyborney.com
Steve Wyborney
Clue #1
Clue #2
Clue #3
Clue #4
Clue #1
The answer is a 2-digit number that
is greater than 40.
Clue #2
The answer is not a square number.
Clue #3
The answer is 2 more than
a square number.
Clue #4
The answer is not a multiple of 11.
www.stevewyborney.com
Steve Wyborney
After seeing the clues, you have
narrowed the possibilities to a
small set of numbers.  Before you
see the answer, select your final
estimate.  Write it down, and
explain to someone why you chose
that number.
www.stevewyborney.com
Steve Wyborney
83 bears
The Reveal
Click to see the answer.
Important Note:
If you can see this box, then the slide show is
not playing and the reveal won’t work.
Here is the solution:
If you are using PowerPoint, click on Slide
Show, then click on From Beginning.
If you are using Google Slides, click on View
then Present.
www.stevewyborney.com
Steve Wyborney
 
80 Cube Conversations
Lessons
 
The Original
50 Splat! Lessons
 
The Original
20 Fraction
Splat! Lessons
 
More Free, Downloadable Resources From Blog Posts
 
20 Days of
Number Sense
& Rich Math Talk
 
The Original 40
Estimation Clipboard
Sets
 
51 Esti-Mysteries
 
To Access The Multiplication Course…
 
1.
Click 
here
 
to see the chapter playlists on my YouTube channel.
2.
Click on “sort by” (on the right side) and choose 
Date created (oldest)
3.
You’ll see all 12 chapters in the course.
 
Tips for Using the Multiplication Course
 
When looking at playlists, click on the words “View Full Playlist” instead of the
thumbnail or the chapter title.
Then click on the share button.
Copy the link and send it to your class.
Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the
needs of your class.
 
For more information read the blog post about The Multiplication Course 
here
.
 
November  1 – January 8
 
Part 2 - New Esti-Mysteries and 
Number Sense
Resources Every 
Day for the Rest 
of the School Year
 
January 11 – February 26
 
New Esti-Mysteries and 
Number Sense Resources
Every 
Day for the Rest 
of the School Year
 
March 1 - ongoing
 
Part 3 - New Esti-Mysteries and Number Sense
Resources Every Day for the Rest of the School Year
“More Than a Square Bear”
Important Note:
If you can see this box, then the slide show is
not playing and the reveal won’t work.
Here is the solution:
If you are using PowerPoint, click on Slide
Show, then click on From Current Slide.
If you are using Google Slides, click on View
then Present.
www.stevewyborney.com
Steve Wyborney
As the clues appear, use the
information to narrow the
possibilities to a smaller set.  After
each clue, use estimation again to
determine which of the remaining
answers is the most reasonable.
How many bears are in the glass?
Write down your first estimate.
After each clue, you’ll see if your
estimate is still a possibility.  After
each clue, if it is no longer possible
write down a new estimate – and
be prepared to explain why you
chose it.
www.stevewyborney.com
Steve Wyborney
Clue #1
Clue #2
Clue #3
Clue #4
Clue #1
The answer is a 2-digit number that
is greater than 40.
Clue #2
The answer is not a square number.
Clue #3
The answer is 2 more than
a square number.
Clue #4
The answer is not a multiple of 11.
www.stevewyborney.com
Steve Wyborney
After seeing the clues, you have
narrowed the possibilities to a
small set of numbers.  Before you
see the answer, select your final
estimate.  Write it down, and
explain to someone why you chose
that number.
www.stevewyborney.com
Steve Wyborney
83 bears
The Reveal
Click to see the answer.
Important Note:
If you can see this box, then the slide show is
not playing and the reveal won’t work.
Here is the solution:
If you are using PowerPoint, click on Slide
Show, then click on From Beginning.
If you are using Google Slides, click on View
then Present.
www.stevewyborney.com
Steve Wyborney
 
80 Cube Conversations
Lessons
 
The Original
50 Splat! Lessons
 
The Original
20 Fraction
Splat! Lessons
 
More Free, Downloadable Resources From Blog Posts
 
20 Days of
Number Sense
& Rich Math Talk
 
The Original 40
Estimation Clipboard
Sets
 
51 Esti-Mysteries
 
To Access The Multiplication Course…
 
1.
Click 
here
 
to see the chapter playlists on my YouTube channel.
2.
Click on “sort by” (on the right side) and choose 
Date created (oldest)
3.
You’ll see all 12 chapters in the course.
 
Tips for Using the Multiplication Course
 
When looking at playlists, click on the words “View Full Playlist” instead of the
thumbnail or the chapter title.
Then click on the share button.
Copy the link and send it to your class.
Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the
needs of your class.
 
For more information read the blog post about The Multiplication Course 
here
.
 
November  1 – January 8
 
Part 2 - New Esti-Mysteries and 
Number Sense
Resources Every 
Day for the Rest 
of the School Year
 
January 11 – February 26
 
New Esti-Mysteries and 
Number Sense Resources
Every 
Day for the Rest 
of the School Year
 
March 1 - ongoing
 
Part 3 - New Esti-Mysteries and Number Sense
Resources Every Day for the Rest of the School Year
“More Than a Square Bear”
Important Note:
If you can see this box, then the slide show is
not playing and the reveal won’t work.
Here is the solution:
If you are using PowerPoint, click on Slide
Show, then click on From Current Slide.
If you are using Google Slides, click on View
then Present.
www.stevewyborney.com
Steve Wyborney
As the clues appear, use the
information to narrow the
possibilities to a smaller set.  After
each clue, use estimation again to
determine which of the remaining
answers is the most reasonable.
How many bears are in the glass?
Write down your first estimate.
After each clue, you’ll see if your
estimate is still a possibility.  After
each clue, if it is no longer possible
write down a new estimate – and
be prepared to explain why you
chose it.
www.stevewyborney.com
Steve Wyborney
Clue #1
Clue #2
Clue #3
Clue #4
Clue #1
The answer is a 2-digit number that
is greater than 40.
Clue #2
The answer is not a square number.
Clue #3
The answer is 2 more than
a square number.
Clue #4
The answer is not a multiple of 11.
www.stevewyborney.com
Steve Wyborney
After seeing the clues, you have
narrowed the possibilities to a
small set of numbers.  Before you
see the answer, select your final
estimate.  Write it down, and
explain to someone why you chose
that number.
www.stevewyborney.com
Steve Wyborney
83 bears
The Reveal
Click to see the answer.
Important Note:
If you can see this box, then the slide show is
not playing and the reveal won’t work.
Here is the solution:
If you are using PowerPoint, click on Slide
Show, then click on From Beginning.
If you are using Google Slides, click on View
then Present.
www.stevewyborney.com
Steve Wyborney
 
80 Cube Conversations
Lessons
 
The Original
50 Splat! Lessons
 
The Original
20 Fraction
Splat! Lessons
 
More Free, Downloadable Resources From Blog Posts
 
20 Days of
Number Sense
& Rich Math Talk
 
The Original 40
Estimation Clipboard
Sets
 
51 Esti-Mysteries
 
To Access The Multiplication Course…
 
1.
Click 
here
 
to see the chapter playlists on my YouTube channel.
2.
Click on “sort by” (on the right side) and choose 
Date created (oldest)
3.
You’ll see all 12 chapters in the course.
 
Tips for Using the Multiplication Course
 
When looking at playlists, click on the words “View Full Playlist” instead of the
thumbnail or the chapter title.
Then click on the share button.
Copy the link and send it to your class.
Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the
needs of your class.
 
For more information read the blog post about The Multiplication Course 
here
.
 
November  1 – January 8
 
Part 2 - New Esti-Mysteries and 
Number Sense
Resources Every 
Day for the Rest 
of the School Year
 
January 11 – February 26
 
New Esti-Mysteries and 
Number Sense Resources
Every 
Day for the Rest 
of the School Year
 
March 1 - ongoing
 
Part 3 - New Esti-Mysteries and Number Sense
Resources Every Day for the Rest of the School Year
Slide Note
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Explore a fun and engaging math activity where you must estimate the number of bears in a glass by using given clues to narrow down possibilities. Choose from different slide sets for classroom or distance learning settings. Enhance estimation skills and critical thinking through this interactive session designed by Steve Wyborney.


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  1. Which set should I use? Watch this YouTube video for more information about the charts. https://youtu.be/pzPby1HUSQs Esti-Mysteries are already working well for my class. Use slides 2-7 if Esti-Mysteries are already working well for you. These slides are exactly the same with no changes. You re students already have a way of writing down their estimates and are responding to each clue. They may be using a digital platform to record their thinking, or are writing on paper, or are using a dry erase board or chart or they have another way of responding to clues in writing. You probably already notice that when students write down their estimate after each clue that it helps to propel rich math talk and also builds anticipation for the next clue. If this sounds familiar, then I recommend using slides 1-6. FURTHER OPTIONS FOR DISTANCE LEARNING I need a chart for everyone to see, and I have a way to digitally write on it. Use slides 8-13 if you simply need an embedded chart to write on during discussion. This may be particularly useful for distance learning if students do not have easy access to a chart. Perhaps they don t have a chart at home, or they may not be able to easily navigate between tabs to a digital chart. You can use a digital pen (such as a drawing feature) to record ideas from student discussions and cross out numbers for the whole class to see at the same time. I need a step-by-step animated chart that eliminates numbers after every clue. Use slides 14-19 if you want to see numbers disappear from the chart after every clue. This may be helpful if you need a chart and don t have an easy way to digitally write on the chart. You can move forward and backward to see which clues eliminated which numbers.

  2. More Than a Square Bear Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Current Slide. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  3. How many bears are in the glass? As the clues appear, use the information to narrow the possibilities to a smaller set. After each clue, use estimation again to determine which of the remaining answers is the most reasonable. Write down your first estimate. After each clue, you ll see if your estimate is still a possibility. After each clue, if it is no longer possible write down a new estimate and be prepared to explain why you chose it. Steve Wyborney www.stevewyborney.com

  4. Clue #1 Clue #1 The answer is a 2-digit number that is greater than 40. Clue #2 Clue #2 The answer is not a square number. Clue #3 Clue #3 a square number. The answer is 2 more than Clue #4 Clue #4 The answer is not a multiple of 11. Steve Wyborney www.stevewyborney.com

  5. After seeing the clues, you have narrowed the possibilities to a small set of numbers. Before you see the answer, select your final estimate. Write it down, and explain to someone why you chose that number. Steve Wyborney www.stevewyborney.com

  6. The Reveal 83 bears Click to see the answer. Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Beginning. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  7. Part 3 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year Part 2 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Clipboard Dice.jpg C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Part 3 Feature Pic.jpg C:\Users\Steve Wyborney\Desktop\STEVES Esti-Mystery Clue Toolkit and Templates FALL 2020.jpg November 1 January 8 January 11 February 26 March 1 - ongoing More Free, Downloadable Resources From Blog Posts C:\Users\Steve Wyborney\Desktop\20 Days Title Pic.jpg C:\Users\Steve Wyborney\Desktop\SPLAT blog post folder\Splat Promo Images and GIFs\Splat Level 3 B.jpg C:\Users\Steve Wyborney\Desktop\Splat Promos HUGE SET\Slide6.JPG C:\Users\Steve Wyborney\Desktop\Presentation1.jpg C:\Users\Steve Wyborney\Desktop\8.8.2018 Desktop\Estimation Clipboard Desktop Materials\Bundle 1 Glasses Pic.jpg 20 Days of Number Sense Rich Math Talk 51 Esti-Mysteries The Original 50 Splat! Lessons 20 Days of Number Sense & Rich Math Talk 51 Esti-Mysteries The Original 20 Fraction Splat! Lessons 80 Cube Conversations Lessons The Original 40 Estimation Clipboard Sets To Access The Multiplication Course Click here to see the chapter playlists on my YouTube channel. Click on sort by (on the right side) and choose Date created (oldest) You ll see all 12 chapters in the course. 1. 2. 3. Tips for Using the Multiplication Course When looking at playlists, click on the words View Full Playlist instead of the thumbnail or the chapter title. Then click on the share button. Copy the link and send it to your class. Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the needs of your class. For more information read the blog post about The Multiplication Course here.

  8. More Than a Square Bear Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Current Slide. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  9. How many bears are in the glass? As the clues appear, use the information to narrow the possibilities to a smaller set. After each clue, use estimation again to determine which of the remaining answers is the most reasonable. Write down your first estimate. After each clue, you ll see if your estimate is still a possibility. After each clue, if it is no longer possible write down a new estimate and be prepared to explain why you chose it. Steve Wyborney www.stevewyborney.com

  10. Clue #1 Clue #1 The answer is a 2-digit number that is greater than 40. Clue #2 Clue #2 The answer is not a square number. Clue #3 Clue #3 a square number. The answer is 2 more than Clue #4 Clue #4 The answer is not a multiple of 11. 41 51 61 71 81 91 42 52 62 72 82 92 43 53 63 73 83 93 44 54 64 74 84 94 45 55 65 75 85 95 46 56 66 76 86 96 47 57 67 77 87 97 48 58 68 78 88 98 49 59 69 79 89 99 50 60 70 80 90 100 Steve Wyborney www.stevewyborney.com

  11. After seeing the clues, you have narrowed the possibilities to a small set of numbers. Before you see the answer, select your final estimate. Write it down, and explain to someone why you chose that number. Steve Wyborney www.stevewyborney.com

  12. The Reveal 83 bears Click to see the answer. Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Beginning. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  13. Part 3 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year Part 2 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Clipboard Dice.jpg C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Part 3 Feature Pic.jpg C:\Users\Steve Wyborney\Desktop\STEVES Esti-Mystery Clue Toolkit and Templates FALL 2020.jpg November 1 January 8 January 11 February 26 March 1 - ongoing More Free, Downloadable Resources From Blog Posts C:\Users\Steve Wyborney\Desktop\20 Days Title Pic.jpg C:\Users\Steve Wyborney\Desktop\SPLAT blog post folder\Splat Promo Images and GIFs\Splat Level 3 B.jpg C:\Users\Steve Wyborney\Desktop\Splat Promos HUGE SET\Slide6.JPG C:\Users\Steve Wyborney\Desktop\Presentation1.jpg C:\Users\Steve Wyborney\Desktop\8.8.2018 Desktop\Estimation Clipboard Desktop Materials\Bundle 1 Glasses Pic.jpg 20 Days of Number Sense Rich Math Talk 51 Esti-Mysteries The Original 50 Splat! Lessons 20 Days of Number Sense & Rich Math Talk 51 Esti-Mysteries The Original 20 Fraction Splat! Lessons 80 Cube Conversations Lessons The Original 40 Estimation Clipboard Sets To Access The Multiplication Course Click here to see the chapter playlists on my YouTube channel. Click on sort by (on the right side) and choose Date created (oldest) You ll see all 12 chapters in the course. 1. 2. 3. Tips for Using the Multiplication Course When looking at playlists, click on the words View Full Playlist instead of the thumbnail or the chapter title. Then click on the share button. Copy the link and send it to your class. Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the needs of your class. For more information read the blog post about The Multiplication Course here.

  14. More Than a Square Bear Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Current Slide. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  15. How many bears are in the glass? As the clues appear, use the information to narrow the possibilities to a smaller set. After each clue, use estimation again to determine which of the remaining answers is the most reasonable. Write down your first estimate. After each clue, you ll see if your estimate is still a possibility. After each clue, if it is no longer possible write down a new estimate and be prepared to explain why you chose it. Steve Wyborney www.stevewyborney.com

  16. Clue #1 Clue #1 The answer is a 2-digit number that is greater than 40. Clue #2 Clue #2 The answer is not a square number. Clue #3 Clue #3 a square number. The answer is 2 more than Clue #4 Clue #4 The answer is not a multiple of 11. 41 51 61 71 81 81 81 41 51 61 71 81 91 91 91 91 41 51 61 41 51 61 71 71 42 52 62 72 82 92 92 92 92 42 52 62 72 82 82 82 42 52 62 72 72 42 52 62 43 53 63 73 73 43 53 63 43 53 63 73 83 93 93 93 93 43 53 63 73 83 83 83 44 54 64 74 84 84 84 44 54 64 74 74 44 54 64 74 84 94 94 94 94 44 54 64 45 55 65 75 85 95 95 95 95 45 55 65 75 75 45 55 65 45 55 65 75 85 85 85 46 56 66 76 86 86 86 46 56 66 76 76 46 56 66 76 86 96 96 96 96 46 56 66 47 57 67 47 57 67 77 87 87 87 47 57 67 77 77 47 57 67 77 87 97 97 97 97 48 58 68 48 58 68 78 88 98 98 98 98 48 58 68 78 78 48 58 68 78 88 88 88 49 59 69 79 89 99 99 99 99 49 59 69 79 89 89 89 49 59 69 79 79 49 59 69 50 60 70 80 90 100 100 100 100 50 60 70 50 60 70 80 80 50 60 70 80 90 90 90 Steve Wyborney www.stevewyborney.com

  17. After seeing the clues, you have narrowed the possibilities to a small set of numbers. Before you see the answer, select your final estimate. Write it down, and explain to someone why you chose that number. Steve Wyborney www.stevewyborney.com

  18. The Reveal 83 bears Click to see the answer. Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Beginning. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  19. Part 3 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year Part 2 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Clipboard Dice.jpg C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Part 3 Feature Pic.jpg C:\Users\Steve Wyborney\Desktop\STEVES Esti-Mystery Clue Toolkit and Templates FALL 2020.jpg November 1 January 8 January 11 February 26 March 1 - ongoing More Free, Downloadable Resources From Blog Posts C:\Users\Steve Wyborney\Desktop\20 Days Title Pic.jpg C:\Users\Steve Wyborney\Desktop\SPLAT blog post folder\Splat Promo Images and GIFs\Splat Level 3 B.jpg C:\Users\Steve Wyborney\Desktop\Splat Promos HUGE SET\Slide6.JPG C:\Users\Steve Wyborney\Desktop\Presentation1.jpg C:\Users\Steve Wyborney\Desktop\8.8.2018 Desktop\Estimation Clipboard Desktop Materials\Bundle 1 Glasses Pic.jpg 20 Days of Number Sense Rich Math Talk 51 Esti-Mysteries The Original 50 Splat! Lessons 20 Days of Number Sense & Rich Math Talk 51 Esti-Mysteries The Original 20 Fraction Splat! Lessons 80 Cube Conversations Lessons The Original 40 Estimation Clipboard Sets To Access The Multiplication Course Click here to see the chapter playlists on my YouTube channel. Click on sort by (on the right side) and choose Date created (oldest) You ll see all 12 chapters in the course. 1. 2. 3. Tips for Using the Multiplication Course When looking at playlists, click on the words View Full Playlist instead of the thumbnail or the chapter title. Then click on the share button. Copy the link and send it to your class. Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the needs of your class. For more information read the blog post about The Multiplication Course here.

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