Creative Ideas for Celebrating the 100th Day of School

The 100th day of school is a special milestone, marking just how far students have come since the beginning of the year. It’s a fantastic opportunity to make learning fun, foster creativity, and build classroom community. Teachers are always looking for fresh and meaningful 100th day of school activities to engage their students and celebrate this achievement. To help you craft a memorable day, we’ve gathered creative classroom celebration ideas that are both educational and exciting!

100 Reasons to be Thankful

Start the 100th day of school with a heartwarming activity that blends gratitude, reflection, and goal-setting! This exercise invites students to celebrate their growth by looking back on their accomplishments, recognizing how they’ve grown, and imagining what they can achieve moving forward. Work together as a class to create a collaborative list, or encourage students to craft their own lists on paper. Use inspiring prompts like “100 things I’m grateful for” or “100 lessons I’ve learned so far” to spark thoughtful responses. Not only does this activity nurture self-awareness and positivity, but it also ties beautifully into writing practice, making it both meaningful and curriculum-friendly.

Get Thinking with the "100 Categories Challenge Free Resource Game"

Get your students thinking outside the box with the 100 Categories Challenge Free Resource Game. This activity challenges students to come up with 100 creative ideas within specific categories (like “100 animals,” “100 foods,” or “100 places”). This game promotes brainstorming and teamwork while making students challenge their thinking. Use it as a warm-up activity or a collaborative class project! Tip: Add a timer to add some extra excitement and competition! 

Free 100 Challenge Worksheet – A Fun & Educational 100th Day of School Activity for Kids

A$0.00

Celebrate the 100th day of school with this FREE 100 Challenge Worksheet! Designed for elementary students, this exciting and educational activity invites kids to brainstorm and list 100 items across fun categories like foods, places, and animals. It is a perfect way to mark this special milestone, and it also encourages creativity, boosts vocabulary, and sharpens organizational skills—all while bringing plenty of smiles to the classroom or homeschool environment.

Shop

​Teach Real-Life Skills with a Party Planning Budget

Math can often feel like a chore for students—so why not integrate it into something fun, like party planning? The 100th Day of School Party Planning Budget Activity asks students to imagine they’re hosting a celebration for their class with a $100 budget. From choosing decorations to selecting snacks, this activity teaches valuable skills like budgeting, addition, and strategic thinking. You’ll love seeing how quickly they realize $100 doesn’t go as far as they might think!

Free $100 Party Planning Budget Activity – Teach Budgeting & Math Skills with Fun

A$0.00

Make learning about money fun and engaging with this FREE $100 Party Planning Budget Activity! Designed for elementary and middle school students, this exciting activity challenges kids to plan the ultimate party while staying within a $100 budget. They’ll explore creative options for food, decorations, and entertainment while sharpening their math skills and learning essential decision-making strategies.

Shop

​Promote Writing with 100th Day of School Writing Prompts

Encourage your students to express themselves with 100th Day of School Writing Prompts. These prompts inspire kids to think creatively while practicing their writing skills. There are four exciting prompts to choose from. Pairing these prompts with fun illustrations or even a classroom gallery walk makes the activity more engaging. Pro tip: If your students enjoy digital platforms, try letting them type their stories or create slideshows to share with the class.

Free 100th Day of School Writing Prompt Pack

A$0.00

Celebrate the 100th day of school with creativity and learning! This free writing prompt pack is perfect for engaging your students in meaningful reflection and fun writing activities. Each prompt encourages creativity, critical thinking, and carries the fun theme of one hundred.

Shop

​Solve Mysteries with "The Case of the 100 Missing Treats"

Add some suspense to the day with The 100th Day of School Math Mystery: The Case of the 100 Missing Treats. Available in a digital graphic game format or printable worksheet packs, this activity lets your students become detectives while solving math problems. With various levels of difficulty, you can tailor the challenge to any grade (1st through 6th). Students will be immersed in the story and have fun flexing their critical thinking and math skills in the process. Bonus points if you add costumes or detective props to the activity!

100th Day of School Digital CSI Math Mystery Game - Escape Room (Differentiated)

A$7.50

100th Day of School CSI Digital Math Mystery GAME with lots of graphics and a computer game-like experience. Your students can play the Case of The 100 Missing Treats in a digital game format. This resource is designed to be played on any device with an Internet connection (please read the technical tips section and try the free clue below to see if it works for you).

Mystery meets an escape room with this style of game! Your students will need to discover passwords at the end of each clue in order to access the next clue. Your Teacher copy will contain all links and passwords.

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

Implementation Suggestion: Turn it into a competition to see who can solve the mystery first in your classroom OR set a timer with a limit that everyone must aim to beat to solve the case and save Christmas! (Or assign a single clue at a time if you prefer to break it up into smaller chunks).

Shop

100th Day of School Math Mystery Activity - 1st Grade Edition

A$4.50

100th Day of School Math Mystery Activity - 1st Grade Math Worksheets Edition

The Case of the 100 Missing Treats

• Useful for a fun way to practice and review math skills during the 100th Day of School.
• Students must use their math skills to unlock clues. Then, use their powers of deduction to narrow down the suspects to find who stole 100 treats from the school party hall!
• 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.

(Please note: The videos now come with voiceovers to read the story).

Shop

100th Day of School Math Mystery Activity - 2nd Grade Edition

A$4.50

100th Day of School Math Mystery Activity - 2nd Grade Math Worksheets Edition

The Case of the 100 Missing Treats

• Useful for a fun way to practice and review math skills during the 100th Day of School.
• Students must use their math skills to unlock clues. Then, use their powers of deduction to narrow down the suspects to find who stole 100 treats from the school party hall!
• 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.

(Please note: The videos now come with voiceovers to read the story).

Shop

100th Day of School Math Mystery Activity - 3rd Grade Edition

A$4.50

100th Day of School Math Mystery Activity - 3rd Grade Math Worksheets Edition

The Case of the 100 Missing Treats

EASY PREP worksheets, print and solve! Useful for a fun way to practice and review math skills during the 100th Day of School.

⭐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.

(Please note: The videos now come with voiceovers to read the story).

Shop

100th Day of School Math Mystery Activity - 4th Grade Edition

A$4.50

100th Day of School Math Mystery Activity - 4th Grade Math Worksheets Edition

The Case of the 100 Missing Treats

• Useful for a fun way to practice and review math skills during the 100th Day of School.
• Students must use their math skills to unlock clues. Then, use their powers of deduction to narrow down the suspects to find who stole 100 treats from the school party hall!
• 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.

(Please note: The videos now come with voiceovers to read the story).

Shop

100th Day of School Math Mystery Activity - 5th Grade Edition

A$4.50

100th Day of School Math Mystery Activity - 2nd Grade Math Worksheets Edition

The Case of the 100 Missing Treats

• Useful for a fun way to practice and review math skills during the 100th Day of School.
• Students must use their math skills to unlock clues. Then, use their powers of deduction to narrow down the suspects to find who stole 100 treats from the school party hall!
• 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.

(Please note: The videos now come with voiceovers to read the story).

Shop

100th Day of School Math Mystery Activity - 6th Grade Edition

A$4.50

100th Day of School Math Mystery Activity - 6th Grade Math Worksheets Edition

The Case of the 100 Missing Treats

• Useful for a fun way to practice and review math skills during the 100th Day of School.
• Students must use their math skills to unlock clues. Then, use their powers of deduction to narrow down the suspects to find who stole 100 treats from the school party hall!
• 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.

(Please note: The videos now come with voiceovers to read the story).

Shop

​Try a Math Warm-Up with "How Many Ways Can You Make 100?"

Math meets creativity in this fun and adaptable warm-up activity! Challenge your students to explore how many different ways they can make 100. Younger kids might use drawings or physical objects, like manipulatives or blocks, to visually represent their ideas. Older students can create equations using addition, subtraction, multiplication, and division to craft unique solutions. For example, one group might represent 100 with “50 + 50,” while another might use “25 x 4.” This engaging activity gets all ages thinking critically and is a great way to kick off your math lessons on the 100th day!

​Extra Creative Ideas to Inspire Teachers

Not every celebration has to revolve around worksheets and prompts. Here are a few additional ways to make the 100th day of school unforgettable for your students:

• "100 Acts of Kindness" Challenge: Motivate students to work together and perform 100 acts of kindness throughout the day. Whether it’s writing positive notes for peers or helping a classmate, this activity fosters a caring classroom environment.
• DIY 100th Day Hats: Supply paper, markers, and stickers for students to create their own wacky "100th Day Hats." Bonus points if you’re rocking one yourself!
• Counting Up to 100: For younger grades, set up fun counting activities using 100 items such as beads, pennies, or candies. You can even make edible "100" necklaces from Cheerios and string!
• Dress-Up Fun: Ask students and teachers to come dressed as their 100-year-old selves. It’s a hit every year and leads to loads of laughs!
• 100 Second Challenges: Create a series of quick, entertaining challenges for students to complete in 100 seconds, like stacking cups or hopping on one foot. These are great for brain breaks throughout the day.

​Wrap-Up the 100th Day with Memories

To end the day on a high note, consider creating a time capsule or snapping a class photo. Students can contribute small items or short notes reflecting on their favorite moment of the year so far. Revisit the time capsule at the end of the school year to see how far everyone has come!
The 100th day of school is a big deal for teachers and students alike. By incorporating activities like the 100th Day of School Challenge Worksheet, 100 Categories Game, the thrilling Math Mystery, and math exercises like How Many Ways Can You Make 100, you’ll have a day filled with laughter, creativity, and learning. Mix in extra activities to keep things fresh, and you’ll create a classroom celebration that your students will remember for years to come.
Share Your Ideas!What are your favorite 100th day of school activities? We’d love to hear about the creative ways you celebrate in your classroom! Drop your ideas in the comments below.
Happy 100th Day of School! 🎉