100th Day Projects: 100 Creative Ideas for the 100th Day of School

I remember one year when B’s school was doing the whole 100th Day Project thing. It was during the time period when he was really into LEGO.

But this is what he did. We went through his LEGO bin and counted out 100 LEGO bricks. Then, he used one of those base things, what are they called? I forget. Anyway, it’s in the photo below. But he made the number “100” out of 100 LEGO bricks. I thought it was a really smart idea.

Pennsylvania mandates 180 instructional days for public schools. So, another fun thing to think about it is that when you hit that 100th day mark–you’re over the hump! Only 80 more days to go.

100th Day Project Ideas

If you want to print off this list you can. A PDF version of “100 ideas for the 100th day of school” is at the end of this post. Perfect for you to brainstorm and plan, or take to your next faculty meeting.

100th Day Classroom Decorations and Displays

• “100 Days Smarter” banner designed by the class

• A wall of 100 compliments: each student writes 5 kind notes

• 100-item picture graph (stickers, stamps, fingerprints!)

• A hallway gallery: “100 Things We’ve Learned”

• 100 balloons surprise (countdown popping optional!)

• “Our First 100 Days” photo timeline

• 100 positive affirmations posted around the building

• “We’re 100 and Counting” handprint mural

• 100-link paper chain — snap the last link on Day 100

• Giant “100” sculpture made from recyclables

100th Day Math Games and Challenges

• 100-second math fact challenges
• 100 chart mystery pictures
• Count to 100 using tally marks
• Build 100 using base-10 blocks
• Race to 100 board game
• 100 pattern hunt around the room
• Predict how many steps to walk 100 feet
• 100-coin toss data chart
• Build a tower using exactly 100 cups
• Roll dice to get to 100 first
• Estimate how many items fill a jar — reveal on Day 100
• 100 skip-count hopscotch
• 100-piece puzzle relay
• “What weighs 100 grams?” inquiry table
• 100 math word problems written by students

100th Day Reading & Writing Fun

• Read-aloud marathon: 100 minutes or pages
• Write 100-word stories
• “When I’m 100…” creative aging stories (respectful version!)
• 100 vocabulary challenge
• List 100 favorite books from the class
• Make 100-word poems (acrostics, haikus stretched to 100 syllables!)
• 100 jokes collection
• “100 ways to be a good friend” class book
• Write letters to future selves on Day 100
• “100-Second Book Talks” presentations
• Hunt for 100 sight words
• 100 facts about animals/space/history
• Create 100-step directions for a silly task
• 100 adjectives to describe school
• “100 Dreams for the World” writing challenge

100th Day Arts, Crafts and Maker Projects

• 100-item collages
• Crown of 100 objects (stickers, gems, mini erasers!)
• Design 100 dots like Peter H. Reynolds’ “The Dot”
• LEGO creations using exactly 100 bricks
• Bead bracelets with 100 beads
• “100 Days Brighter” sunglasses craft
• Create a class quilt: 100 decorated squares
• Finger-paint 100 fireworks
• Make a 100-piece friendship paper chain
• Design a shirt with 100 things (family project)
• Pixel-style drawing on a 100-square grid
• Build robots using 100 recycled parts
• 100 flags from around the world wall
• Dot-to-dot posters to 100
• 100 hearts for kindness wall
• Tiny art museum with 100 mini masterpieces
• Paint with 100 brushstrokes
• 100 leaf or nature rubbings
• “100 items we love about school” mural
• Puzzle collaboration: 100-piece student-designed puzzle

100th Day Movement and PE Activities

• 100 jumping jacks challenge
• 100-step scavenger walk
• Relay races with 100 passes
• Dance for 100 seconds to start every hour
• “100 laps” mini-track around the classroom
• Stack 100 cups as a team
• Balloon toss: keep it up for 100 taps
• Yoga: hold poses for 100 seconds
• 100-point obstacle course
• 100 freeze-dance winners (cycle through quick rounds)

100th Day STEM Curiosity Stations

• What takes 100 seconds to melt? (ice, chocolate observations)
• Build a structure that can hold 100 pennies
• Domino chain reaction with 100 dominos
• Magnifying glass station: 100 tiny objects
• Code a bot to move 100 cm
• Drop experiments: from 100 cm height
• Planting: What grows in 100 hours?
• 100-bead coding bracelets (patterns/sequencing)
• Paper airplanes: Which flies 100 inches?
• “100-second science” lightning demos all day long

100th Day Kindness and Community Ideas

• Collect 100 canned goods or pantry staples
• Pack 100 thank-you notes for staff
• 100-book donation goal for a local library
• 100 acts of kindness photo challenge
• Snack bags for 100 families (team project with families)
• 100 pennies for a cause
• Make 100 bookmarks to give away
• Chalk the sidewalks with 100 positive messages
• 100 pet treats for a local shelter
• Ask a local elder (maybe someone turning 100!) to share wisdom via Zoom

100th Day Dress-Up and Celebration Themes

• “100 Years of Learning” century-themed but respectful
• “100-Day Heroes” capes covered in 100 symbols
• Dress as your favorite 100-item collection
• Gumball machine shirt with 100 dots
• 100-star student badges
• Wear 100 stickers all day
• Hair decorated with 100 clips or ribbons
• 100-emoji day (draw or wear!)
• 100-color rainbow outfits (collectively reach 100 colors)
• Parade of 100: students carry their project creations

I hope this helps. Here’s printable list to take to your faculty meeting or prep meeting with other teachers, as you plan this celebration.