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100th Day of School Ideas

36 classroom ideas for the 100th day of school, sorted by grade, plus four free printables: a 100 Days Smarter crown, a certificate, a 100 things collection sheet and writing prompts. Not sure of the date yet? Find it with the 100th Day of School Calculator.

Download the free printables (PDF, 4 pages)

Free 100th day printables

One PDF, four pages. Print only the pages you need.

1. 100 Days Smarter crown

Two strips that tape together into a crown of about 20 inches. One strip has space for a name and one thing they learned.

2. Certificate

A landscape certificate with lines for the name, the date and your signature.

3. My 100 Things Collection

A 10 by 10 grid with running totals down the side, so children can see 10, 20, 30 as they fill it.

4. 100th day writing prompts

Five prompts with writing lines, from "When I am 100 years old" to "In the last 100 days, I learned".

Quick ideas (10 to 15 minutes)

  1. 100-second challenges. How many times can you write your name, stack cups or do jumping jacks in 100 seconds? Have students guess first, then count.
  2. Count to 100 with moves. Change the move every 10: claps, hops, toe touches, arm circles, then back to claps.
  3. Me at 100. Students draw themselves at 100 years old and write one sentence about what their day looks like.
  4. Ways to make 100. Give five minutes to write as many number sentences as possible that equal 100, like 50 + 50 or 10 x 10.
  5. 100 words we know. As a class, fill a sheet of chart paper with 100 words you learned this year.

Pre-K and kindergarten

  1. 100 things bags. Each child brings 100 small things from home, then sorts them into 10 groups of 10 on a mat. The tips further down help families get it right.
  2. Cereal necklaces. Thread 10 pieces of one color, then switch colors, until there are 100. Check food allergies first.
  3. Sticker hundred chart. Put one sticker in each box of a hundred chart and count by tens to check.
  4. 100 cup tower. Small groups get exactly 100 plastic cups and try to build the tallest tower.
  5. Snack mix of 100. Ten snacks, ten pieces of each, mixed in a cup. Again, check allergies.
  6. Crown time. Color and wear the 100 Days Smarter crown from the printables.

1st and 2nd grade

  1. Hundred chart patterns. Color every multiple of 2 in one color, 5 in another and 10 in a third, then talk about the patterns you see.
  2. Estimation jars. Fill three jars with different amounts. Only one has exactly 100. Students guess which one, then count it in tens.
  3. Make 100 cents. Find different ways to make 100 cents with pennies, nickels, dimes and quarters.
  4. Class 100-piece puzzle. Hand out the pieces and build it together during the day.
  5. 100 books. Track books read aloud or alone in the weeks before, and celebrate reaching 100 on the day.
  6. 100 Things Collection sheet. Children glue or draw one thing in each box and watch the running total grow.
  7. I am 100 days smarter because. Each child finishes the sentence on a paper strip for a class banner.

3rd to 5th grade

  1. Fitness stations. Set up stations where students do as many reps as they can in 100 seconds and add up the class total.
  2. How long is 100? Measure 100 inches, 100 centimeters and 100 steps on the playground, then compare.
  3. Letters to the future. Write about what school might look like 100 years from now.
  4. 100 answers survey. Ask one question across several classes until you have 100 answers, then make a bar graph.
  5. Race to 100. Partners roll two dice and add. The first to reach exactly 100 wins, so they have to plan near the end.
  6. 100-word story. Write a story that has exactly 100 words. Counting forces careful editing.
  7. Party on 100 dollars. Plan a class party with a $100 budget using a store flyer, and show the math.

Middle school

  1. Percent hunt. Find 10 real percentages in news or ads and explain what each one means out of 100.
  2. 100-year timeline. Place one event from each of the last 10 decades on a class timeline.
  3. Percent grid art. Color a 10 by 10 grid so that set percentages are each color, like 35% blue and 25% green.
  4. 100-word summary. Sum up the current unit in exactly 100 words.
  5. Estimate, then measure. How many paper clips long is your desk? Estimate, measure, and find who was within 10%.
  6. 100 problems relay. Teams race to solve 100 short review problems split across the class.

Class-wide and school-wide

  1. 100 things we learned banner. Everyone adds what they learned until the banner has 100 entries.
  2. Dress like you are 100. A popular tradition. Keep it kind and about getting older, not making fun of anyone.
  3. 100 kind acts. Track kind acts on a hundred chart in the days before, and finish on the 100th day.
  4. Collect 100 cans. Turn the day into a food drive with a goal of 100 cans or more.
  5. Certificates. Hand out the 100 Days of School certificate at the end of the day.

Tips for the 100 things project

Good things to count: buttons, stickers, paper clips, pom-poms, building bricks, pebbles, pasta shapes, cotton balls or pennies.

  • Ask families to pack them in ten small bags of 10. Counting at school then takes minutes, not an hour.
  • Put a name on the bag or container.
  • Skip food if anyone in the class has allergies, and skip tiny items like beads for young children.
  • Send the note home about two weeks before the day.

A simple plan for the day

Frequently asked questions

What do you do on the 100th day of school?

Most classes count, build and write around the number 100. Popular ideas are 100 things collections, 100 cup towers, 100-second challenges, a 100 Days Smarter crown and writing about being 100 years old.

When is the 100th day of school?

It depends on your first day of school and your days off, so every school has its own date. For schools that start in late August or early September, it usually lands in late January or February. The 100th Day of School Calculator finds your exact date.

What can kids bring for the 100 things project?

Small, countable things such as buttons, stickers, paper clips, pom-poms, building bricks or pennies. Packing them in ten bags of 10 makes counting at school quick.

How do you celebrate 100 days in middle school?

Use the number for math and writing: a percent hunt in the news, percent grid art, a 100-year timeline, a 100-word summary or a 100-problem review relay.

What do you write on a 100th day crown?

Most crowns say 100 Days Smarter. The free crown in our printables has that on the front strip and space for a name and one thing the child learned on the back strip.

Are the 100th day printables free?

Yes. The PDF is free to print for your class or your family. It has four pages: the crown, a certificate, a 100 things sheet and writing prompts.

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