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Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
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Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition
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What others say

"I love that I can purchase the same mystery at various levels. This allows ALL students in my classroom to feel included, successful, and seen! Math Mysteries are consistently TOP NOTCH!"
star
Jessica R.
"My students loved these math mysteries when I taught 2nd grade and I am so glad that there is a first grade version! The students were engaged and this was a great review lesson. "
star
Julie F.

Description

Earth Day Math Mystery "The Case of The Litterbug" - 1st Grade Edition. Easy prep! Just Print & Solve! Or go paperless with the new Google Slides option provided within your download.


A video hook is provided to set the stage to engage! Check out the video hook in the preview section.

A bonus ENDING VIDEO clip is included to celebrate finishing the mystery.

Update: >>The Videos now have voiceovers<<


Students will need to answer a variety of math problems to help them figure out who the Litterbug is! Engage and motivate your students with this unique, fun way to review their math skills.


Easy Prep!

  • PDF printable version - print and copy the worksheets, and your student detectives are ready to solve!
  • Google Slides Digital version - Find the link in the Teacher Instructions section to open the worksheets digitally in Google Slides. Make a copy for your students and assign it. Students must be in 'edit' mode to enter answers.

<<<<>>>>

  • Clue 1: Making 10 - Fill in the missing number
  • Clue 2: Adding three numbers (one-digit numbers, totals between 1-20)
  • Clue 3: Ordering Numbers (one-digit and two-digit numbers)
  • Clue 4: Comparing Numbers (greater than or less than 50 - numbers between 1-99)
  • Clue 5: Addition word problems (1-20)

⭐Also included:

  • Answer key
  • The worksheets in Google Slides
  • Printable certificates

How long will this activity take?

The time to complete will vary anywhere between 30 minutes and 2 hours! It mainly depends on how familiar your students are with the math mystery format and how difficult they find math skills covered in the particular mystery. Please check the math skills outlined in the clues above to help determine suitability for your class. I recommend pacing this activity by giving students one clue at a time. Once the whole class has completed a clue, move on to the next clue within the same lesson or the next math session. New math content presented? Make a lesson out of it by modeling the math before diving into the clue. I like to say, "We must learn something new before attempting the next clue." There are lots of ways to implement this activity in your classroom; learn more in the blog post link below:

Read Blog Post: Five Easy Ways to use Math Mysteries in your Classroom.

Multiple Uses

Great for:

  • Review
  • Consolidation
  • Math Centers
  • Extra Practice
  • Enrichment
  • Early Finishers
  • Homework
  • Substitute Teachers

Great Earth Day Math Activity!


This Earth Day Math Mystery activity is available for GRADES 1-6!

Case of the Litterbug ==Grade 1== Click here

Case of the Litterbug ==Grade 2== Click here

Case of the Litterbug ==Grade 3== Click here

Case of the Litterbug ==Grade 4== Click here

Case of the Litterbug ==Grade 5== Click here

Case of the Litterbug ==Grade 6== Click here


Add extra motivation with this Detective Rank Chart Download the Mystery Record & Rank Chart FREEBIE HERE

Bundle and Save!

COMPLETE Math Mystery Bundle - 1st Grade

Holiday Math Mystery Bundle {GRADE 1}

SEASONS Math Mystery Bundle Pack (GRADE 1)

-----------------------------------------------------------------------------------------------------------------

Not sure what a math mystery is? CLICK HERE to watch a video about Math Mysteries.

TRY A FULL FREE MATH MYSTERY HERE (GRADES 1 - 6 DIFFERENTIATED BUNDLE)

Browse the 1st Grade Range:

>>Download the FREE 1st Grade Math Mystery Checklist here<<

>> CLICK HERE to follow my store <<

-----------------------------------------------------------------------------------------------------------------

For more ideas, activities, and resources, follow my store (by clicking the little green star) to stay updated on new releases. We can also stay connected via:

Blog

Pinterest

Facebook

Instagram @mrsjsresourcecreations

___________________________________________________________________

Thank you!

Mrs. J.

© 2016

Please note that the Grade 1 Math Mysteries cannot be 'clue swapped' with other Grade Math Mystery versions for customization/differentiation as you usually can with Grades 2-6.

Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

Earth Day Activity: Math Mystery Game - 1st Grade CSI Math Edition

Mrs J's Resource Creations
41.6k Followers
$4.95

Highlights

Digital downloads
Grades icon
Grades
Standards icon
Standards
Pages
16
Answer Key
Included

What others say

"I love that I can purchase the same mystery at various levels. This allows ALL students in my classroom to feel included, successful, and seen! Math Mysteries are consistently TOP NOTCH!"
star
Jessica R.
"My students loved these math mysteries when I taught 2nd grade and I am so glad that there is a first grade version! The students were engaged and this was a great review lesson. "
star
Julie F.

Save even more with bundles

Math Mysteries for the HOLIDAYS collection. 1st Grade Edition. These fun math mystery activities will get your students excited about doing math! Save with this Math Mystery holiday bundle for 1st Grade! Engage and motivate your students to review a variety of math skills with this collection of fun
Price $82.22Original Price $117.45Save $35.23
24
Math Mysteries COMPLETE collection for 1st Grade. This complete math mystery bundle contains all of my math mysteries for Grade 1 up to date! Make math fun and exciting with these engaging activities that will motivate even some of your most reluctant learners.Easy prep! Just Print &amp; Solve! Or g
Price $199.77Original Price $285.40Save $85.63
62
Mrs. J's Math Mystery collection from 1st to 6th grade.Grab all of the math mysteries to engage and motivate your students and differentiate across grade levels! FAQ: Will I be adding more math mysteries to this bundle?A: Yes, I will add new 1st-6th Grade Math Mysteries to this bundle until it reach
Price $1049.45Original Price $1750.70Save $701.25
369

Description

Earth Day Math Mystery "The Case of The Litterbug" - 1st Grade Edition. Easy prep! Just Print & Solve! Or go paperless with the new Google Slides option provided within your download.


A video hook is provided to set the stage to engage! Check out the video hook in the preview section.

A bonus ENDING VIDEO clip is included to celebrate finishing the mystery.

Update: >>The Videos now have voiceovers<<


Students will need to answer a variety of math problems to help them figure out who the Litterbug is! Engage and motivate your students with this unique, fun way to review their math skills.


Easy Prep!

  • PDF printable version - print and copy the worksheets, and your student detectives are ready to solve!
  • Google Slides Digital version - Find the link in the Teacher Instructions section to open the worksheets digitally in Google Slides. Make a copy for your students and assign it. Students must be in 'edit' mode to enter answers.

<<<<>>>>

  • Clue 1: Making 10 - Fill in the missing number
  • Clue 2: Adding three numbers (one-digit numbers, totals between 1-20)
  • Clue 3: Ordering Numbers (one-digit and two-digit numbers)
  • Clue 4: Comparing Numbers (greater than or less than 50 - numbers between 1-99)
  • Clue 5: Addition word problems (1-20)

⭐Also included:

  • Answer key
  • The worksheets in Google Slides
  • Printable certificates

How long will this activity take?

The time to complete will vary anywhere between 30 minutes and 2 hours! It mainly depends on how familiar your students are with the math mystery format and how difficult they find math skills covered in the particular mystery. Please check the math skills outlined in the clues above to help determine suitability for your class. I recommend pacing this activity by giving students one clue at a time. Once the whole class has completed a clue, move on to the next clue within the same lesson or the next math session. New math content presented? Make a lesson out of it by modeling the math before diving into the clue. I like to say, "We must learn something new before attempting the next clue." There are lots of ways to implement this activity in your classroom; learn more in the blog post link below:

Read Blog Post: Five Easy Ways to use Math Mysteries in your Classroom.

Multiple Uses

Great for:

  • Review
  • Consolidation
  • Math Centers
  • Extra Practice
  • Enrichment
  • Early Finishers
  • Homework
  • Substitute Teachers

Great Earth Day Math Activity!


This Earth Day Math Mystery activity is available for GRADES 1-6!

Case of the Litterbug ==Grade 1== Click here

Case of the Litterbug ==Grade 2== Click here

Case of the Litterbug ==Grade 3== Click here

Case of the Litterbug ==Grade 4== Click here

Case of the Litterbug ==Grade 5== Click here

Case of the Litterbug ==Grade 6== Click here


Add extra motivation with this Detective Rank Chart Download the Mystery Record & Rank Chart FREEBIE HERE

Bundle and Save!

COMPLETE Math Mystery Bundle - 1st Grade

Holiday Math Mystery Bundle {GRADE 1}

SEASONS Math Mystery Bundle Pack (GRADE 1)

-----------------------------------------------------------------------------------------------------------------

Not sure what a math mystery is? CLICK HERE to watch a video about Math Mysteries.

TRY A FULL FREE MATH MYSTERY HERE (GRADES 1 - 6 DIFFERENTIATED BUNDLE)

Browse the 1st Grade Range:

>>Download the FREE 1st Grade Math Mystery Checklist here<<

>> CLICK HERE to follow my store <<

-----------------------------------------------------------------------------------------------------------------

For more ideas, activities, and resources, follow my store (by clicking the little green star) to stay updated on new releases. We can also stay connected via:

Blog

Pinterest

Facebook

Instagram @mrsjsresourcecreations

___________________________________________________________________

Thank you!

Mrs. J.

© 2016

Please note that the Grade 1 Math Mysteries cannot be 'clue swapped' with other Grade Math Mystery versions for customization/differentiation as you usually can with Grades 2-6.

Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

Reviews

4.9
Rated 4.89 out of 5, based on 301 reviews
301
ratings
5
279
4
21
3
1
2
0
1
0
Mostly used with 1st grade
Reviews
10
117
30
15
5
5
4
K
1st
2nd
3rd
4th
5th
6th
What customers are saying
Met expectations
100%
Is a great value
100%
Is standards-aligned
100%
All verified TPT purchases
Always a great choice!
Rated 5 out of 5
May 12, 2026
Met expectations
Great value
Standards-aligned
This resource helped to solidify many of the skills we are currently working on!
StelterSales
(TPT Seller)
95 reviews • Wisconsin
Grades taught: 1st
Awesome resource
Rated 5 out of 5
May 7, 2026
Met expectations
Great value
Standards-aligned
These math mysteries are all wonderful.
Michele L.
961 reviews • New York
Grades taught: PreK, K, 1st, 2nd
Engaging Resource
Rated 5 out of 5
May 6, 2026
Met expectations
Great value
Standards-aligned
I love that I can purchase the same mystery at various levels. This allows ALL students in my classroom to feel included, successful, and seen! Math Mysteries are consistently TOP NOTCH!
Jessica Rau
(TPT Seller)
235 reviews • Minnesota
Grades taught: 5th
Student populations: Autism, Emerging bilinguals, Learning difficulties, Mild to severe disabilities
Great Resource
Rated 5 out of 5
April 30, 2026
Met expectations
Great value
Standards-aligned
My students loved these math mysteries when I taught 2nd grade and I am so glad that there is a first grade version! The students were engaged and this was a great review lesson.
Julie F.
461 reviews • Florida
Grades taught: 1st
Great activity
Rated 5 out of 5
April 26, 2026
Met expectations
Great value
Standards-aligned
My students love these! I have purchased several and my children always ask for more.
Teresa D.
383 reviews • Ohio
Grades taught: 1st
Great Resource
Rated 5 out of 5
April 23, 2026
Excellent resource, exactly what I needed! Thank you!
betty C.
466 reviews • New York
Student populations: Mild to severe disabilities
Great Resource
Rated 5 out of 5
March 26, 2026
This is a great resource to use for kindergartners.
Keagin B.
155 reviews • Wyoming
Grades taught: K
Student populations: Autism, Emerging bilinguals, Learning difficulties, Mild to severe disabilities
Good resource
Rated 5 out of 5
March 15, 2026
Fantastic resource! My students found it engaging and the instructions were clear and easy to follow. Will definitely use again.
131 reviews • Maryland
Grades taught: 1st

Questions & Answers

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Standards

to see state-specific standards (only available in the US).
Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
Apply properties of operations as strategies to add and subtract. If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
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