100th Day of School Ideas for Elementary Teachers

The 100th day of school is a major milestone in elementary classrooms — and it’s the perfect chance to combine celebration with learning. Whether you’re looking for academic activities, classroom projects, themed snacks, or creative dress-up ideas, this guide has the 100th day of school ideas you need to make the day unforgettable for your students.

What are some 100th day of school ideas for teachers?

Celebrating the 100th day of school is a fun way to reinforce core math and literacy concepts, build classroom community, and spark creativity. Here are some ideas that teachers can easily adapt to different grade levels:

Create a “100 Things We’ve Learned” Wall

Each student contributes one thing they’ve learned so far. Post them all on the wall for a collective reflection on growth and knowledge.

Read Books About the Number 100

Choose engaging read-alouds like:

• Miss Bindergarten Celebrates the 100th Day of Kindergarten by Joseph Slate

• 100th Day Worries by Margery Cuyler

• The Night Before the 100th Day of School by Natasha Wing

Create a “100-Year Time Capsule”

Ask students:

What would you put in a box to show someone in 2124 what life is like today?

Let them draw or describe their items, or even create them with craft supplies. Display them in a cardboard “capsule” in the hallway.

“100-Word Stories”

Challenge students to write a complete story in exactly 100 words.

This is amazing for:

• Writing concisely

• Story structure

• Vocabulary choice

Pair with illustrations and bind them into a class book: “100 Words, 100 Worlds.”

Set Up 100-Second Challenges

Have students complete tasks in 100 seconds — like writing as many words as they can, stacking cups, or doing jumping jacks.

Decorate the Classroom with 100s

From balloons and banners to paper chains made of 100 links — make your classroom feel festive with easy, low-prep decor.

What are some 100th day of school activities or projects?

100 Items Collection Project

Ask each student to bring in a collection of 100 small items (paperclips, buttons, stickers, etc.) and present their collection to the class. Bonus: turn it into a math and sorting lesson.

Build Something Using 100 Supplies

Challenge students to create a structure using 100 building blocks, LEGOs, or craft materials. They can work individually or in small groups.

100 Acts of Kindness

Track kind deeds throughout the week and reach 100 acts of kindness as a class. Great for reinforcing social-emotional learning.

“When I’m 100 Years Old” Writing Prompt

Have students write and illustrate a story about what their life will be like when they turn 100.

What to do for a 100 day celebration?

A 100th day celebration can include music, games, themed activities, and interactive stations. Here are some easy ways to celebrate:

Morning Countdown

Start the day with a 100-second countdown and celebrate with claps, cheers, or confetti poppers.

100 Step Walk

Go on a walk around the school or playground — and stop to observe the world after exactly 100 steps.

Station Rotation

Set up different classroom centers, each themed around the number 100:

• Count to 100 with snacks

• Make a 100-bead bracelet

• 100-themed coloring sheets

• Do 100 jumping jacks (split among classmates)

What snacks are counted for the 100th day of school?

Snack time is a great opportunity to reinforce counting and nutrition. Here are some tasty, themed ideas:

Trail Mix: 10 Snacks x 10 Pieces

Let students create their own trail mix by counting out 10 pieces each of your desired snack items.

100 Snack Bags

Pre-portion 100-count snack bags (or do it as a group) — perfect for kindergarteners learning to group by 10s.

How should I dress my child for 100 days of school?

Many schools invite kids to dress up for the 100th day — either in themed outfits or as if they’re 100 years old.

“100 Years Old” Costume

Classic and hilarious. Use:

• Baby powder in hair for a gray look

• Suspenders or oversized cardigans

• Glasses with the lenses popped out

• Canes or walkers made from pool noodles or cardboard

100-Item Shirt

Draw or glue 100 small items (pom-poms, googly eyes, buttons) on a T-shirt. Let your child help with the design.

Number 100 Hat or Crown

Make a crown with the number 100 and decorate it with glitter, stickers, or stamps.

The 100th Day of School

Whether you’re planning an all-out celebration or a low-key classroom activity, the 100th day of school is a meaningful moment to reflect, laugh, and learn. Incorporate math, movement, art, and storytelling into your plans — and don’t forget to take plenty of photos!

With creativity and a few simple materials, you can make the 100th day a highlight of the school year.