170 New Esti-Mysteries

This school year, I’m embarking on my most ambitious Esti-Mystery creation journey yet.  I’ll be creating and posting 170 brand new Esti-Mysteries.  I’ll be posting a new one nearly every day for the rest of the school year – just like last year.  However, this school year, I’m beginning the journey 1 month earlier.


The pattern will be just like last year. I’ll post a new Esti-Mysteries nearly every day – often taking Fridays off. See the schedule below for more details.


The purpose is the same as last year:  Sharing math joy with you all year long! Prepare for math joy and rich math talk in your classroom as your students work with many concepts, estimation, and a sense of mystery! May your classroom be filled with math joy and rich math talk all year long.


As always, I’ll let everyone who is subscribed to my email list know when new resources are posted.


Posting Schedule


  • 3-Container Estimation Routines (All Grade Levels)  will be posted here.
  • New Estimation Clipboards (All Grade Levels) can be found here.


  • Esti-Mystery (Kindergarten)
  • Esti-Mystery – Level 100 – (Grades 1-2)
  • Esti-Mystery – Level 300 – (Grades 3-8)


  • Esti-Mystery Level 200 – (Grades 1-3)


  • Esti-Mystery – Level 400 – (Grades 4-12)

Fridays (some Fridays)



For more information, see the FAQs at the bottom of this post.



New 3-Container Estimation Routines can be found here.  (All Grade Levels)


Tuesday, January 24, 2023

Kindergarten:  Esti-Mystery 72  –  “Animal Erasers”


Grades 1-2:  Esti-Mystery 189  –  “The Dice is in the Air”


Grades 3-8:  Esti-Mystery 388  –  “Erase-Stemystery” 


Wednesday, January 25, 2023

Grades 1-3:  Esti-Mystery 283  –  “Can Dice Fly?” 


Thursday, January 26, 2023

Grades 4-12:  Esti-Mystery 452  –  “One out of Three Digits is in the Answer” 




Frequently Asked Questions


How to Download the Esti-Mysteries

Q:  How do I get the Esti-Mysteries?

A:  Simply click on the BLUE download link that is the name of the Esti-Mystery.


The Google Slides Question

Q:  These are PowerPoint files, but I use Google Slides.  Can I use them?

A:  Yes!  I use them in both PowerPoint and Google Slides.  After you download the PowerPoint file, make a new folder in google drive and save it into that folder.  Then click on the file (I usually right-click it) and the choose “open with” and then Google Slides.  Then just click Present.


To Receive Notifications

Q:  How can I find out when new Esti-Mysteries are posted?

A:  Simply sign-up for the mailing list on the blog, and I’ll let you know when new ones are posted.


The Clues / The Reveal

Q:  How to I get the clues to appear one by one?

Q:  How do I get the reveal to appear?

A:  Make sure the slide show is playing.  In PowerPoint, click on View Show.  In Google Slides, click on Present.  When it’s playing the clues will appear one at a time, and when you reach the reveal it will appear when you click.


The Embedded Charts

Q:  I see that some of these have charts.  Which one do I use?

A:  Each Esti-Mystery comes with 3 versions (3 options) so you can choose the one you want to use.  The first one has no chart.  The second one has a chart that is show so that you can write on it.  The third one has an animated chart that will shade in numbers that have been eliminated by the clues.  Use the one that works best for you.

More Esti-Mysteries…

Tuesday, October 4

Kindergarten:  Esti-Mystery 58  –  “The Top of the Order”


Grades 1-2:  Esti-Mystery 175  –  “The Top on the Top”


Grades 3-8:  Esti-Mystery 374  –  “Spinning Tops”


Wednesday, October 5

Grades 1-3:  Esti-Mystery 269  –  “A Tip Top Esti-Mystery”


Thursday, October 6

Grades 4-12:  Esti-Mystery 438  –  “The Number on the Top”


Tuesday, October 11

Kindergarten:  Esti-Mystery 59  –  “Dinosaur Eggs”


Grades 1-2:  Esti-Mystery 176  –  “Look Closely to Spot 5 Yellow Eggs”


Grades 3-8:  Esti-Mystery 375  –  “Triple Time”


Wednesday, October 12

Grades 1-3:  Esti-Mystery 270  –  “The Clues Can Crack the Case”


Thursday, October 13

Grades 4-12:  Esti-Mystery 439  –  “The Difference Between the Eggs”


Tuesday, October 18

Kindergarten:  Esti-Mystery 60  –  “Stamping Out Numbers”


Grades 1-2:  Esti-Mystery 177  –  “The Paper Clue”


Grades 3-8:  Esti-Mystery 376  –  “If You Spell Out the Number”


Wednesday, October 19

Grades 1-3:  Esti-Mystery 271  –  “The Inky Clue”


Thursday, October 20

Grades 4-12:  Esti-Mystery 440  –  “Stamping Out the Clues”


Tuesday, October 25

Kindergarten:  Esti-Mystery 61  –  “Pencil Sharpeners” 


Grades 1-2:  Esti-Mystery 178  –  “Sharpening Our Ideas” 


Grades 3-8:  Esti-Mystery 377  –  “Sharpening the Clues” 


Wednesday, October 26

Grades 1-3:  Esti-Mystery 272  –  “Sharpening Our Estimation Skills” 


Thursday, October 27

Grades 4-12:  Esti-Mystery 441  –  “Pencil Patterns”


Tuesday, November 1

Kindergarten:  Esti-Mystery 62  –  “Kind of Like a Cactus” 


Grades 1-2:  Esti-Mystery 179  –  “How Many Clues Can Fit on a Die?” 


Grades 3-8:  Esti-Mystery 378  –  “A 2-Digit Number” 


Wednesday, November 2

Grades 1-3:  Esti-Mystery 273  –  “Colorful Cacti”  


Thursday, November 3

Grades 4-12:  Esti-Mystery 442  –  “What Happened to the Die?” 






Tuesday, November 8

Kindergarten:  Esti-Mystery 63  –  “Dice Inside Dice” 


Grades 1-2:  Esti-Mystery 180  –  “How Did the Dice Get Inside the Dice?” 


Grades 3-8:  Esti-Mystery 379  –  “Double Dice Triple Time”


Wednesday, November 9

Grades 1-3:  Esti-Mystery 274  –  “I Can See Through the Large Dice” 


Thursday, November 10

Grades 4-12:  Esti-Mystery 443  –  “Factoring in the Dice” 


Tuesday, November 15

Kindergarten:  Esti-Mystery 64  –  “Cupcake Erasers”


Grades 1-2:  Esti-Mystery 181  –  “Cupcake Vase”


Grades 3-8:  Esti-Mystery 380  –  “So Many Cupcakes”


Wednesday, November 16

Grades 1-3:  Esti-Mystery 275  –  “Five Cupcakes at a Time”


Thursday, November 17

Grades 4-12:  Esti-Mystery 444  –  “Glass of Cupcakes”


Tuesday, November 22

Kindergarten:  Esti-Mystery 65  –  “Mirror Balls”


Grades 1-2:  Esti-Mystery 182  –  “Reflection and Refraction”


Grades 3-8:  Esti-Mystery 381  –  “One-Fourth of a Clue”


Wednesday, November 23  

Grades 1-3:  Esti-Mystery 276  –  “It’s Behind the Vase”


Thursday, November 24

Grades 4-12:  Esti-Mystery 445  –  “Upon Reflection”


Tuesday, November 29

Kindergarten:  Esti-Mystery 66  –  “Wristband Coils” 


Grades 1-2:  Esti-Mystery 183  –  “Curly Coils” 


Grades 3-8:  Esti-Mystery 382  –  “How the Tag is Connected to 61” 


Wednesday, November 30

Grades 1-3:  Esti-Mystery 277  –  “The Narrow Vase of Coiled Wristbands” 


Thursday, December 1

Grades 4-12:  Esti-Mystery 446  –  “The Tag Makes All the Difference” 



Tuesday, December 6

Kindergarten:  Esti-Mystery 67  –  “The Pencils are Bent”


Grades 1-2:  Esti-Mystery 184  –  “Pretzeled Pencils”


Grades 3-8:  Esti-Mystery 383  –  “Pencil Knots”


Wednesday, December 7

Grades 1-3:  Esti-Mystery 278  –  “The Pencils are Tied in Knots”


Thursday, December 8

Grades 4-12:  Esti-Mystery 447  –  “Pencil Prime Time”



Tuesday, December 13

Kindergarten:  Esti-Mystery 68  –  “Red Rocks” 


Grades 1-2:  Esti-Mystery 185  –  “What Kind of Rocks are in the Bowl?” 


Grades 3-8:  Esti-Mystery 384  –  “Shiny Rocks” 


Wednesday, December 14

Grades 1-3:  Esti-Mystery 279  –  “Red Rock Vase” 


Thursday, December 15

Grades 4-12:  Esti-Mystery 448  –  “When one-sixth is a Multiple of Three” 


Tuesday, January 3, 2023

Kindergarten:  Esti-Mystery 69  –  “Colorful Dice” 


Grades 1-2:  Esti-Mystery 186  –  “The Double Pattern Challenge” 


Grades 3-8:  Esti-Mystery 385  –  “The Clues on the Top” 


Wednesday, January 4, 2023

Grades 1-3:  Esti-Mystery 280  –  “Marbled Dice” 


Thursday, January 5, 2023

Grades 4-12:  Esti-Mystery 449  –  “Dice and Halves”


Tuesday, January 10, 2023

Kindergarten:  Esti-Mystery 70  –  “Sea Creatures”


Grades 1-2:  Esti-Mystery 187  –  “Swimmers”


Grades 3-8:  Esti-Mystery 386  –  “Sea Creatures Rounding Down”


Wednesday, January 11, 2023

Grades 1-3:  Esti-Mystery 281  –  “Visiting Land”


Thursday, January 12, 2023

Grades 4-12:  Esti-Mystery 450  –  “How Many Tentacles?”


Tuesday, January 17, 2023

Kindergarten:  Esti-Mystery 71  –  “All Eyes are on the Clues” 


Grades 1-2: Esti-Mystery 188  –  “Looking for Clues”


Grades 3-8:  Esti-Mystery 387  –  “The Orange Creature is Looking Right at a Clue” 


Wednesday, January 18, 2023

Grades 1-3:  Esti-Mystery 282  –  “I See a Clue” 


Thursday, January 19, 2023

Grades 4-12:  Esti-Mystery 451  –  “The First Appearance of the Floating Die” 




  1. Megan on October 18, 2022 at 10:41 pm

    My first graders LOVE the Esti-Mysteries! Thank you for sending them each week. Can you remind me why some Esti-Mysteries show a die and what does it represent? I think you posted about this before, but I can’t seem to find the answer. Thank you!

    • Steve Wyborney on October 19, 2022 at 6:15 am

      Hi, Megan. That’s a great question! Sometimes the die has a clue, and sometimes it doesn’t. It’s always a bit of a surprise whether it holds a clue or not, and if the clue will point out or eliminate numbers. Another important way I use the die is as a size reference because sometimes it helps students to better picture the size of the objects or the container.

  2. Sami b on October 18, 2022 at 9:55 pm

    I have to say I have done one of these every day with my class and they love it! I even started having a student a day be the teacher and walk the rest of the class through it as they are really starting to understand it. It is such a good warm up to get their minds ready for math.

    • Steve Wyborney on October 23, 2022 at 7:26 am

      What a great idea!

  3. Isabelle on October 13, 2022 at 5:36 pm

    Hi Steve!
    I have been following you for years now. My students and I just love everything you create especially the esti-mysteries. Thank you so much for sharing your great work!

    • Steve Wyborney on October 17, 2022 at 6:19 am

      I really appreciate this note, Isabelle!

  4. Lisa H. on October 11, 2022 at 9:22 am

    Have already incorporated this into my class this year. Used the 3 Container one today and they love it as much as EstiMystery and Estimation Clipboard. It really makes them think mathematically!

    • Steve Wyborney on October 12, 2022 at 6:27 am

      I’m so happy to hear this, Lisa! Thank you for sharing – and I’ll keep the materials coming!
      Wishing you a great day,

      • janine on October 13, 2022 at 6:34 am

        Hi Steve, these look fantastic. where are the powerpoint files to download? please respond to:

        Thank you

        • Steve Wyborney on October 13, 2022 at 7:16 am

          Hi, Janine. To access the files scroll down until you see the dates. The download link is the blue link below each date.

  5. Nelia on October 10, 2022 at 10:28 pm

    Thank you for your wonderful work and for sharing.

    • Steve Wyborney on October 11, 2022 at 6:05 am

      It’s my pleasure!

  6. Karen Gartland on October 5, 2022 at 10:12 am

    When I click on the link for the 3-container estimation routines click in the email above, it takes me to the website link with estimation clipboards. Am I doing something wrong?
    Karen Gartland

    • Steve Wyborney on October 5, 2022 at 4:26 pm

      Hi, Karen. I may have sent the wrong link. Here is the link to the 3-container Estimation Routine. I hope you like it! https://stevewyborney.com/2022/10/the-3-container-estimation-routine/

      • Karen Gartland on October 5, 2022 at 4:39 pm

        Thank you so much Steve!!! We love everything you create and are so appreciative of your generosity. Although I have purchased your “class” to make my own esti–mysteries I still like using yours as well. I am looking forward to doing the three-container estimation routines with the kiddos.

        • Steve Wyborney on October 10, 2022 at 5:54 am

          Thank you so much for all of this, Karen. I’ll keep the resources coming!

  7. Jennifer Ablack on October 5, 2022 at 7:38 am

    Hi Steve! I love your stuff! My class loves it too. Here’s my problem….only one has worked for me. I can’t to get past all the ads and I want to show it without all the extras. Any suggestions?

    • Steve Wyborney on October 5, 2022 at 4:32 pm

      Hi, Jennifer. I posted some new ones yesterday. If you scroll down to the “New This Week” section, you’ll find the dates and see the new one I posted today. The download links are blue.
      I hope that helps. 🙂

  8. Lis on October 2, 2022 at 9:31 pm

    Thanks so much for these. The class of 7-8 year olds I was looking after last week loved them and asked to make their own. They had heaps of fun although we have a little work to do on clues, although cute, I’m not sure Clue #2: ‘It is a lot’ would help the estimator!

    • Steve Wyborney on October 5, 2022 at 4:37 pm

      That’s really fun! I’m also learning to improve my clues as I go and I love to hear how they are creating their own!

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