100th Day of School Mystery and Activities | Save Zero the Hero Theme Day

Rated 4.92 out of 5, based on 958 reviews
958 Ratings
Grade Levels
PreK - 1st
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86 pages
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What educators are saying

I have never had so much fun on the 100th day of school!! The kids absolutely loved all of the activities! Such a blast!! I can't wait to use this resource again this year!
I absolutely love this! It is a great way to celebrate the 100th Day in a fun way. The students love being detectives.
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  1. Looking for an engaging way for your students to learn and review math, ELA, and NGSS standards? These thematic days ( and optional room transformations ) are a great way for your students to practice number sense, CVC words, letter names, sight words, engineering, science skills, and more in a very
    Price $32.00Original Price $42.00Save $10.00


Do you want to try something different for the 100th day of school? Get ready for a 100th day of school celebration like you've never done before! Your secret agents will love working through missions to rescue Zero the Hero and save 100's Day! Includes math centers, printables, activities, printable decór, and SO much more!

*** Click on the PREVIEW to see what all is included! ***

We were SO inspired by Hope King's spy lab classroom transformation, and we wanted to bring that idea to our kindergartners with a 100's day mystery.

The problem: Zero the Hero was taken by Devious Agent 99 in order to stop the 100th from day from coming. Without the number zero, it will have to be day 99 over and over again.

The premise: Your students will turn into secret agents as they receive their secret agent badge upon entering the classroom. You will play a special PowerPoint presentation (for Mac users) or a YouTube video (for PC users) with a ransom note being read by another secret agent that will "self destruct" after it's heard!

The missions: Your secret agents will work through several missions (all involving the number 100). After they complete a mission, they are able to open up a clue from Devious Agent 99. The missions include:

✷ Writing numbers to 100 (using invisible ink or highlighters)

✷ Cracking the code using giant 10 frames (making 10)

✷ Bowling to 100

✷ Fingerprint science

✷ I Spy Numbers (Magnify It)

✷ STEM with 100

✷ Minute to Win It Activities (with the number 100)

✷ Making spy potions and "Hot on the Trail" Mix

Once your agents have collected all of the clues and put them together to figure out where Zero the Hero is being held, your agents will be off to look for him! Instead of finding Zero the Hero, they will find a special treat left as a reward for saving 100's Day.

This will be a 100th day of school that your students will never forget!

What's included:

✓ Editable sign up sheet for parent donations and volunteers

✓ Note home to students

✓ Evidence markers

✓ Evidence tags

✓ Directions with photos on how to turn your classroom into a spy lab

✓ PowerPoint of a secret agent reading the ransom note and outlining the mission and other mini missions

✓ Secret agent badges (color and black & white)

✓ Spy kit toppers (color and black & white)

✓ Case file covers

✓ Clue envelope covers

✓ Recording sheets to go with missions that require one

✓ Adult direction sheets for each mission

✓ QR code for Fingerprint Science investigation video

✓ Snack counting templates and spy potion cover

✓ Snack bag topper

✓ Spy certificate (color and black & white)

✓ Links to our blog post and YouTube video with further explanations of the day

Here's what other teachers had to say!

Kelly D. said, "This was the most fun I've had celebrating the 100th day of school EVER! The class was completely enthralled from the moment they entered the classroom. I can't wait to try another theme day!"

Heather G. said, "This 100th day was EPIC! My students were blown away. From the ID badges to the recording folders, everything worked so well. They do not remember a lot about Kindergarten... but they will remember this day! My admin says she wants to go back to classroom teaching so she can do this kind of fun stuff."

⭐ You can go all out with black lights and yarn, or you can keep it simple with just the Spy Headquarters sign on the door. It's entirely up to you! You can do all of the centers or even just a few of them. Check out our blog www.kinderbrations.com to read about our entire day in more detail.

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If you have any questions, feel free to e-mail us at kinderbrations@gmail.com. Be sure to FOLLOW US for updates, new resources, and freebies!

Happy Teaching!

Michelle Woods and Linda Ekstrom

⭐️ Click H E R E to subscribe to our email list for even more ideas, resources, teaching tips, and FREEBIES!

⭐️ Click H E R E to check out our blog

⭐️ Click H E R E to join our kindergarten Facebook group- Celebrating Kindergarten!

Total Pages
86 pages
Answer Key
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to see state-specific standards (only available in the US).
Count to 100 by ones and by tens.
Count forward beginning from a given number within the known sequence (instead of having to begin at 1).
Write numbers from 0 to 20. Represent a number of objects with a written numeral 0-20 (with 0 representing a count of no objects).
Understand the relationship between numbers and quantities; connect counting to cardinality.
Count to answer “how many?” questions about as many as 20 things arranged in a line, a rectangular array, or a circle, or as many as 10 things in a scattered configuration; given a number from 1-20, count out that many objects.


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