Take the stress out of implementing math centers in your classroom...

Need Help Organizing Your K-5 Math Block?

Use this FREE resource guide to plan your daily math schedule, learn more about math workshop and get recommended resources that make your teacher life easier.

Pumpkin Math Investigations

Are you looking for new ideas for hands-on Fall math activities? Look no further, I have a great math activity just for you, Pumpkin Math Investigations!

Fun hands-on pumpkin math activities for elementary kids

Using read-alouds to teach math concepts is a great way to engage our kids. One of my favorite Fall math books is How Many Seeds in a Pumpkin? In this book, a classroom of students guess how many seeds are in a pumpkin. This is the perfect set up for a math activity.

With that said, let me share Pumpkin Math Investigations!

What You’ll Need for Lessons 1 – 2:

–       Book – How Many Seeds in a Pumpkin?
–       1 Pumpkin (Lesson Parts 1 and 2)
–       A Small Pumpkin OR Pumpkin Seeds in a Brown Bag for each Small Group

What You Will Need For Lesson 3:

–       A Plate
–       Pumpkin Seed Grouping Mats – Free
–       Pumpkin Investigations Recording Sheets – Free
–       LOTS of Hand Sanitizer (LOL!!!!)

This activity is intended to last a couple of days, moving from whole group to small group lessons. Each lesson is focused on grouping, skip counting, comparing numbers and addition. So let’s get to the math!

PART 1:  Whole Group Activity – Estimate How Many Seeds Are in the Pumpkin

Read How Many Seeds in a Pumpkin? and ask questions.  Tell your kids that you bought in a pumpkin, like in the story and you want them to guess how many seeds are inside.

Have students guess the number of pumpkin seeds and record the responses. Write initials next to the number that students guess. Next, remove the top of the pumpkin and scoop out the seeds with a spoon. To get all the seeds you will probably have to use your hands. It’s messy, but fun!

Pumpkin Math - estimate, count and graph pumpkin seeds

Let your kids see the pumpkin seeds on a plate and ask them to now estimate the number of seeds on the plate.  Ask if anyone wants to change their guess. Revise student answers to reflect any changes.

Teacher Tip – Let the seeds air dry, but do not leave them on a paper towel because they will stick. I learned the hard way!

PART II:  Whole Group Activity – Count the Pumpkins Seeds

Once the seeds dry, count the number of seeds using the different grouping mats. Model skip counting on each mat and adding the leftovers.

Pumpkin Math - count pumpkin seeds using grouping mats

Record the total number of seeds on a chart. Have a discussion by comparing the estimations and the total amount of counted seeds.

Write addition equations that represent the seeds on the counting mats.


10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 +10 + 10 + 7 = 127
100 + 20 + 7 = 127

PART III:  Small Group Activity – Estimate, Count and Graph the Pumpkins Seeds

Tell students that they are now going to work in groups to find out the amount of seeds in their pumpkins.

Give each group (4 – 5 kids) a pumpkin and have them repeat everything Part 1 and Part 2. (Pre-cut the tops for safety reasons)

Use the Pumpkin Investigation FREEBIE so that students can record their work.

Pumpkin Math - count and draw pumpkin seeds to find out how many

Pumpkin Math - students graph results in pumpkin investigations booklet

Teacher Tip – For time’s sake, if you want to skip the part where kids scoop the seeds out a pumpkin, use prepackaged pumpkin seeds instead. Place the seeds in a brown paper bag and ask your students to estimate the number of pumpkin seeds in the bag.

Watch my video for more details and don’t forget to download the Pumpkin Investigation FREEBIE.  The book in this post can be found on Amazon. If you decide to purchase the book, I will get a small commission by referring you because I’m a participant in the Amazon Services Program.