100th Day of School Printables: Free K-1 Math Worksheets (PDF)

These free 100th day of school printables make a 9-page pack for kindergarten and 1st grade, mostly math: a “100 is 10 tens” poster, a mat for counting 100 things, three hundreds chart mystery pictures, a 100 moves challenge, a writing page and a cut-out crown. You’ll find the answer keys on the last page.

There’s no sign-up and no email. Just print the 100th day printables PDF. Use it if your child’s class is about to reach day 100, or if you teach and want a pack without a login.

Not counting past 20 yet? Start with the number chart 1-20.

Jump to: the 9 pages · mystery pictures · math by grade · FAQ

Free 100th day printables (PDF)

What’s inside the free 100th day printables:

1. “100 is 10 tens” poster (page 1, K and 1st). Ten rows of ten colored dots, each with its total, up to a big 100. No cutting, no writing.
2. Count 100 things (page 2, K and 1st). Ten empty ten frames to fill with crayon dots or stamps.
3. Mystery picture 1 (page 3, kindergarten, with a grown-up at first). One color, 30 boxes, listed row by row.
4. Mystery picture 2 (page 4, 1st grade; kindergarten with help). Three colors, 48 boxes.
5. Mystery picture 3 (page 5, 1st grade). Four colors and 8 “10 more, 10 less” clue boxes.
6. 100 moves challenge (page 6, K and 1st). Ten moves, 10 of each, with a total to say or write after every row.
7. When I’m 100 years old (page 7, K and 1st). Trace 100, draw yourself at 100, then say or write about it.
8. 100th day crown (page 8, K and 1st). Cut-out strips with 10 ten frames to color.
9. Answer keys (page 9). The three mystery pictures in color, the page 5 clue answers and the totals for pages 6 and 8.

Page 1: 100 is 10 tens, one row of ten at a time.

Print on US Letter at 100%. A few tips:

• No color printer needed. Every puzzle key names its crayon and every answer-key box carries a letter, so all 9 pages print fine in black and white. Pages 1 and 9 are nicer in color.
• Use cardstock for the crown.
• A sheet protector turns page 2 into a day counter. Add a dry-erase dot each school day, then wipe it clean for next year.

100th day hundreds chart mystery pictures

A hundreds chart mystery picture hides a coloring puzzle in the numbers 1 to 100. The pack has three, from a gentle kindergarten page to a 1st grade page with clues. The pictures go unnamed here so the surprise stays a surprise.

How a hundreds chart mystery picture works

On each page you’ll find a numbered hundreds chart and a key. The key lists numbers under each crayon color. Your child finds each number on the chart and colors its box. All the other boxes stay blank.

A picture shows up box by box. Cross off each number as you color it, so none get skipped, then check the picture against the answer key on page 9.

Kindergarten: page 3

Page 3 uses one color, red, and 30 boxes. The key goes row by row, and each row is numbered: “Row 3 (it starts with 21): 22, 24, 25 …”

Reading numbers past 20 is a stretch in kindergarten. Kindergartners learn to write numbers up to 20, so reading 22 or 64 isn’t expected yet (K.CC.3). The row list turns the job into matching digits. Count down to the row, then find the box whose last digit matches. Do it with a grown-up at first.

Page 3: the kindergarten mystery picture, one color, listed row by row.

1st grade: pages 4 and 5

Page 4 has 3 colors and 48 boxes. Each list is in order, with a dot between rows to help keep your place.

Page 5 has 4 colors plus 8 clue boxes, like “10 more than 34”. Your child writes the answer in the clue box, then colors that box on the chart. A 1st grade goal is finding 10 more or 10 less without counting (1.NBT.5).

Want it harder? Have your child write 1 to 100 on the blank hundreds chart first, then color it from page 4’s list (1.NBT.1: read and write numerals to 120).

The three pictures aren’t tied to a season, so they work any month.

Page 5: the 1st grade mystery picture, with a 4-color key and clue boxes.

100th day of school math worksheets for kindergarten and 1st grade

Day 100 lands mid-year, and kindergarten and 1st grade kids sit in very different places. Use each page as one of your 100th day math activities for kindergarten and 1st grade.

Page	Kindergarten	1st grade
1: 100 is 10 tens	Say each row’s total with a grown-up (K.CC.1)	Say “3 tens is 30” for each row (1.NBT.2c)
2: Count 100 things	Color or stamp one box at a time with help; say the frame totals	Fill 100 boxes or 10 piles of 10; say the tens up to 9 tens, then “ten tens is 100” as the surprise
3: Mystery picture 1	With a grown-up at first	A warm-up
4: Mystery picture 2	With help	Yes
5: Mystery picture 3	A grown-up reads the clues, or skip it	Yes: 10 more and 10 less (1.NBT.5)
6: 100 moves	Say each new total	Write each total; count on by ones inside a row (1.NBT.1)
7: When I’m 100	Trace, draw and say it	Write 1 to 3 sentences
8: Crown	Color and say the totals	Color and write the totals
Harder	None	Write 1 to 100 on a blank chart, then color from page 4’s list

Counting to 100 by ones and tens (K.CC.1) is an end-of-kindergarten goal, so on day 100 kindergartners say the tens with a grown-up. “100 is ten tens” is officially a 2nd grade idea (2.NBT.1a). On day 100 it’s a picture to enjoy, not a test.

Page 1 is the check for the rest of the pack: pages 6 and 8 ask for the same row totals. Counting to 100 has a guide of its own: counting by 10s to 100, with our printable hundreds chart.

Count 100 things: 10 groups of 10 (page 2)

Page 2 is a 100th day counting mat. It has 10 empty ten frames, with 10, 20, 30 … 100 printed beside them. Start on paper with a crayon dot or a stamp in each box, one frame at a time, saying each frame’s total.

Got a take-home “bring 100 things” project? Use big things: craft sticks, crayons, drinking straws, paper cups, toy cars. Make 10 piles or bags of 10, and color one frame for each pile. Touch each of the 100 real things once, which is one to one correspondence.

Safety: beads, buttons, dried beans and pom-poms are choking hazards for children under 3 (CPSC small-parts rule), and anything that fits a page 2 box is small-parts size. Keep small things for when a grown-up is close and no younger siblings are at the table. Sending a snack? Check the class’s allergy and food rules first.

Page 2: the counting mat, which doubles as a day counter.

100 moves, writing and the crown (pages 6 to 8)

• 100 moves (page 6): no prep, no screen. Ten moves, 10 of each. Count out loud, color the 10 circles, then say the new total (1st graders write it).
• When I’m 100 years old (page 7): trace 100 over light dots, draw yourself at 100 and finish “When I am 100, I will …” New to writing numbers? Try our number tracing worksheets.
• Crown (page 8): color the 10 ten frames in order and say each total. A grown-up staples strips 2 and 3 onto strip 1’s plain ends and fits the band around the child’s head; plain strip 4 fills the gap on bigger heads.

Page 8: the crown strips, cut out and stapled to fit.

For a dice game to 100, try Race to 100 from our post on first grade math games.

FAQ

When is the 100th day of school?

There’s no national date: count school days, not calendar days. With about 180 school days, day 100 usually lands in late January (August starts) or mid-to-late February (after Labor Day). Ask the teacher, and use page 2 as a day counter until then.

Why do kids celebrate 100 days of school?

It comes a little past the middle of the school year, and it makes 100 something kids can see. That’s 10 groups of 10.

What grade celebrates 100 days of school? Does first grade do it?

Mostly kindergarten and 1st grade, so yes they do. Some pre-K and 2nd grade classes do it too. The table above splits every page by grade.

What are good 100 things collection ideas?

• Big things in 10 piles or bags of 10: craft sticks, crayons, drinking straws, paper cups, toy cars. Each pile colors one frame on page 2.
• Paper-only: 100 stamps or crayon dots, straight onto page 2.
• Small things (beads, buttons, dried beans, cotton balls) only with a grown-up close and no little siblings at the table.

Do I need a color printer?

No. Every puzzle key names its crayon and every answer-key box carries a letter, so all 9 pages print fine in black and white. Pages 1 and 9 are just nicer in color.

The takeaways

• 9 free pages, no email: a poster, a counting mat, 3 mystery pictures, 100 moves, a writing prompt and a crown.
• Kindergartners say it, 1st graders write it. Day 100 is mid-year, and counting to 100 is an end-of-kindergarten goal.
• Paper first for 100 things: dots, stamps, or big things in piles of 10.
• Print the free 100th day printables PDF: the answer keys are on page 9.

Try the free counting board. The ten-frame, addition, subtraction and times-table boards are in the full app. See how Luvinci’s math games work.