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Mailbox Math

By Karen Cox | Affiliate Disclosure

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I recently found these cute little Valentine mailboxes in the Target Dollar Spot, and knew I could use them for something. I think these could have many uses for many different activities. I found two different kinds of mailboxes: one looks like the kind people typically have in front of their house and the other has a little slot like the mailboxes at the post office. For Mailbox Math, I made these printable number and shape envelopes to use with them.

Mailbox Math for Valentine's Day in Preschool

Here’s how to prepare the printable envelopes:

First, print the envelopes (I used card stock), and cut out each envelope as shown in the picture. Do not cut down the middle — this is the fold line.

Mailbox Math: How to make the envelopes

Next, fold each envelope in half, as shown.

Fold the envelopes in half

Then add glue to the inside and stick it down (or use double sided tape). This gives your envelope a front and back to make it look authentic.

Add glue here

Cut out the shape or number cards and attach them to the mailboxes with a loop of tape (see picture below). The shape cards are shown below, but the number set can be used the same way.

How to Play “Mailbox Math”

To play the shapes game, children sort the envelopes by shape into the correct mailboxes. There are four cards for each shape. To play the counting game, children count how many on each envelope and sort them into the correct mailboxes. Each number has four cards. I made numbers 1-10, but that doesn’t mean you have to buy 10 mailboxes. You could buy maybe 5 mailboxes (or however many you want) and choose which numbers to use this week; then switch the numbers out the next week.

sort the shapes into the mailboxes

The envelopes fit perfectly into the mailbox slot.

put the envelopes in the mail slot

The activity above works well for center time. Here’s another way to use these mailboxes, which works well for small group. Place a few cards on the table with one mailbox. Ask a child in the group to find a certain shape. For example, you might tell a child to “Find and mail the purple heart.” or “Find and mail the green hexagon.” You could do the same activity with the number cards.

call out a shape for children to find

I also thought these mailboxes were cute, too. You could use either kind for this game. Here’s the shapes activity…

sort shape cards into mailboxes

And here’s the counting activity…

count how many on each card and sort it into the mailbox

Download and Print

Click to download the PDFs and print.

Shapes Envelopes

Numbers Envelopes

Need Mailbox Literacy Activities?

If you’re looking for Literacy activities to use with these mailboxes, you could print out the Letter Sound Picture Cards, which are just the right size to fit into the mail slots. You could label the mailboxes with letters and have children sort the beginning sounds pictures into the mailboxes.

I also found a Syllable Activity over at Pre-K Pages that uses these very same mailboxes.

Do you have an idea for using these mailboxes? Please share it in the comments section below!

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47 Comments

About Karen Cox

Karen is the founder of PreKinders.com. She also works as a full-time Pre-K teacher in Georgia. Read more...

Reader Interactions

Comments

  1. Rena' Hoggard says

    February 4, 2014 at 9:41 pm

    This is an awesome idea. Thanks for sharing this with me. I will definitely be using this next week. I hope I will be able to find those mailboxes this weekend.

    Reply
    • Karen Cox says

      February 4, 2014 at 10:09 pm

      Thanks, Rena. I hope you find them, too.

      Reply
      • Carol says

        February 6, 2014 at 8:28 pm

        They are available at Target in the dollar bins. There are 3 different colors.

        Reply
      • jacquelyn williams says

        February 11, 2014 at 10:48 pm

        Great idea!!!! We are not aloud to celebrate Valentine’s Day. (sooooo!! sad). I’m saving the idea for when I enter public school.

        Reply
    • Rebecca says

      January 31, 2018 at 7:13 am

      I love this idea as well! If I can’t find the “mailboxes” I am going to try gift boxes. The really heavy duty ones with a lid, and cut a mail slit in it for the envelopes to go in! Thank you!!

      Reply
    • Liz Roberts says

      February 3, 2021 at 10:36 am

      Children love gathering items and placing them in a container(mailbox,spring basket ect.) These mailboxes are a great investment you can always make a pockett to place the item being matched if you do not want to have to redo the outside all the time.
      Laminate several different ideas. Example story sequence. Place the cards in order in the mail box. Take them out and lay them down. Are they in order should we change them? I mean it doesnt have to be Valentines to use them. Great Community helper prop. Also great transition prop. Pass out cards with letters of the alphabet on them If you have a vowel come put it in the mailbox and tell me your center choice…ect. However you teach letters this would work.

      Reply
  2. Jamie White says

    February 4, 2014 at 9:47 pm

    Fantastic idea! I was just browsing through the Target dollar spot yesterday and didn’t see these. This activity may warrant another trip. Thanks for always sharing your fantastic ideas.

    Play to Learn Preschool

    Reply
    • Karen Cox says

      February 4, 2014 at 10:11 pm

      For some reason, all Target stores don’t always have the same things, but I hope you find them. If not, someone on my Facebook page suggested using the square Kleenex tissue boxes.

      Reply
  3. Cyndi says

    February 4, 2014 at 9:47 pm

    Thanks!

    Reply
  4. Michele says

    February 4, 2014 at 10:00 pm

    When did you find these adorable mailboxes at Target’s dollar spot? I definitely don’t see the same things in the Targets here by me!

    Reply
    • Karen Cox says

      February 4, 2014 at 10:13 pm

      I found them about 4 days ago. Sometimes Target stores don’t have the same things, but sometimes I think hoarders buy them all up. 🙁 I hope you find them, but if not, someone suggested using the cube Kleenex tissue boxes.

      Reply
  5. Tonya says

    February 4, 2014 at 10:02 pm

    This sounds great, thanks for sharing

    Reply
  6. Tamara says

    February 4, 2014 at 10:11 pm

    Hi. Are the Target Dollar Spots inside Target, or a separate shop completely? Have never come across it in Australia :(. They are SO cute!!

    Reply
    • Karen Cox says

      February 5, 2014 at 8:51 pm

      The Target Dollar Spot is inside the Target store. Thanks! Hope you can find some little mailboxes somewhere. 🙂

      Reply
  7. Pamela says

    February 4, 2014 at 11:58 pm

    Thank you so much! I can’t wait to try this with my students.

    Reply
  8. Gina says

    February 5, 2014 at 4:53 am

    Very Cute, I can see using these in the Dramatic Play area for mail carrier bag fun! Writing the children’s names on the envelopes, as well, to encourage name recognition, and they can ‘deliver’ the mail to their friends, too. 🙂

    Reply
    • Karen Cox says

      February 6, 2014 at 7:08 pm

      Oh, that would be fun! The kids would love that.

      Reply
  9. Jacqueline (I teach Pre-K too!) says

    February 5, 2014 at 8:45 am

    I passed up the v-day mailboxes at Target because I had too much in my cart! What else is new?! haha, but now I want to go back and get them for math and literacy center activities. I hope they are still there!! Thanks for sharing! I always love your ideas!

    Reply
    • Karen Cox says

      February 6, 2014 at 7:08 pm

      I hope they are still there when you go back!

      Reply
  10. Heather says

    February 5, 2014 at 9:51 am

    I love that I can print this off.
    We don’t do Valentine’s Day but we do Friendship Week. I know that seems a little harsh but the parents appreciate it! We start the Bucket Filling Program that week!

    I can use these letters for the community helpers theme for the mailperson. I bought the little mailboxes from the post office here in Canada.
    We also use this for a transition game. Everyone has mail to post in the boxes on their way to washing hands for snack.

    Reply
    • Karen Cox says

      February 6, 2014 at 7:10 pm

      Sounds like fun!

      Reply
  11. shamila alcock says

    February 5, 2014 at 1:02 pm

    Amazing! Awesome and Fun! Thanks!

    Reply
  12. Diane says

    February 5, 2014 at 1:26 pm

    Thank you so much for this terrific idea! I can’t wait to use them.

    Reply
  13. Molly says

    February 5, 2014 at 11:05 pm

    What an adorable idea! Thanks so much for sharing it.

    Reply
  14. Sue Lewis says

    February 6, 2014 at 9:39 am

    I teach special ed preschool and LOVE all your activities. Thank you for sharing!!!!

    Reply
  15. Deborah says

    February 7, 2014 at 12:51 am

    Dang! I love those little mailboxes at the top! I have the others but I like the first set better. I need to take a trip to our local Target soon!

    Reply
  16. CarolAnn says

    February 8, 2014 at 11:01 am

    Thanks so much! Such a cute cute cute idea, and the best part is children love mail!

    Reply
  17. Christina says

    February 8, 2014 at 12:34 pm

    Really cute! I’m in my first year of teaching preschool, so thank you tons!

    Reply
  18. Karen says

    February 8, 2014 at 5:45 pm

    Thanks so much for the great mailbox ideas! I had seen them in Target but didn’t know how I could use them in my PreK5Class. After seeing your suggestions, I bought 8 of them and have happily been spending the last 4 “snow days” getting them ready for when/if we ever get back to school. LOL (It’s been a rough and snowy winter here in PA.) I laminated my cards for added durability and put velcro on the back of the cards that attach to the mailboxes so they can be changed as my letters of the month and themes change. I can’t wait to get back to work, hopefully on Monday, to let the children “mail” their letters. Thanks again for all your great ideas!
    Karen

    Reply
  19. Laura says

    February 8, 2014 at 5:56 pm

    Thanks so much! I bought a couple of each of these and was working up ideas for them. Now I can use yours. May have to make another trip to get some more mailboxes. Wish I had seen this before I went to Target this afternoon.

    Reply
  20. Laura says

    February 9, 2014 at 10:39 am

    I found both kinds of mailboxes at Target in Augusta, GA (Robert C. Daniel location) as of late Friday afternoon (02/07). It appears they had received a new shipment because there were lots of both kinds! Thank you for your wonderful ideas!!!

    Reply
  21. Jan says

    February 9, 2014 at 5:04 pm

    Thanks for sharing the mailboxes activities.Can’t wait to get to Target to find them. My kindergarten friends will have fun with both the literacy and the math activities.

    Reply
  22. Luz Yepes De La Pava says

    February 10, 2014 at 8:55 pm

    Karen, Thanks for sharing your awesome ideas!!!

    Reply
  23. Peggy Williams says

    February 12, 2014 at 11:15 am

    Thank you for the activity I sure can use it in the classroom.

    Reply
  24. Stephanie Schuler says

    February 14, 2014 at 2:17 pm

    Love this idea! Thanks for sharing such adorable little mailboxes for the kiddos! Our preschool just finished our annual Valentine’s Day card swap, but we went with the old-fashioned paper lunch bags! Maybe for next year?

    Reply
  25. corlette says

    February 15, 2014 at 5:16 pm

    Hi thanks so much for those ideas i an in Antigua so i have no way of getting those mail boxes so i had to use some boxes, but it was quiet fine i am training to be a preschool teacher and i love it. Thanks so much.

    Reply
  26. Marsha vance says

    February 16, 2014 at 10:10 pm

    70% off at my target right now. Great ideas.

    Reply
  27. xan says

    February 19, 2014 at 7:12 am

    I am not allowed to use holiday themes. I used this idea on a unit involving mail carriers. I am also going to use it for financial literacy, I will tape a plastic coin on each mailbox and children can sort the remaining coins into the boxes.

    Reply
  28. laurie mayhnard says

    February 21, 2014 at 2:08 pm

    I loved the envelopes and idea. I saw this post a little late and Target has already moved on to Easter in our area. But I found small wooden gift bags at our local craft stores for a dollar each. I just painted them blue so I could use them throughout the year and put a paper strip across the top and it looks just like a mailbox. Also works well because students can work on both sides of the mailbox.
    I tried to include a pic, but couldn’t.

    Reply
    • Karen Cox says

      February 22, 2014 at 1:29 am

      Neat idea, Laurie! Thanks for sharing. Great use of the printable for other times of year (not just Valentine’s Day).

      Reply
  29. Missy says

    March 1, 2014 at 2:07 pm

    Karen, My kiddos are loving these. (The kids just caught on to the fun yesterday! Better late than never.) I wondered if you thought of adding the color word in color and the name of the shape in black ink. I have some children who would enjoy “reading” the letter they are mailing. Thanks for creating this mailbox/sorting activity.

    Reply
  30. Maria says

    October 5, 2014 at 5:16 am

    You have so many great ideas and this I’m sure will work a treat for counting and number recognition. I have just started out as a pre-school teacher to four year olds learning English as a foreign language and so am gathering ideas and this looks fantastic. Not sure will be able to find those cute mailboxes though!

    Reply
  31. Sandy says

    February 7, 2015 at 12:52 pm

    Karen – Your creations are so much fun! I have been using your site for years – both for freebies and also items for sale on TpT.

    Keep up the good work – we appreciate it!

    Reply
  32. Tina says

    February 3, 2018 at 12:42 am

    I love your ideas! I did something similar for literacy and social studies centers. I taped a letter to the boxes and kiddos sorted picture cards by beginning sound d and for S.S I taped a career and students would sort the tools that career uses. These boxes are fantastic for tons of sorting activities and kids love the mailbox idea. For an extension, you can do a group check or peer check since the letters were “mailed”. Love it!

    Reply
  33. Bret Dixon says

    April 18, 2019 at 10:03 am

    This is a great idea for getting the children excited about shapes. When we did letters with our “mailbox” all they wanted to do was write to each other, so hopefully this will help improve learning their shapes, and I will be incorporating letters to this as well. Thanks for sharing

    Reply
  34. Torika Delailoa says

    February 6, 2021 at 11:03 pm

    Thank you Karen for sharing these amazing heart activities

    Reply
  35. Susan says

    February 15, 2021 at 12:11 pm

    Thank you for this great activity!

    Reply

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Glad you're here! You'll find hands-on learning activities, themes, and printables for Pre-K, Preschool, and Kindergarten kids. I'm Karen Cox, a Pre-K teacher in Georgia. I have taught 4-5 year olds for 20+ years! Read More…

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Would you like to join my FREE weekly update newsletter? Join 85,000+ subscribers!
We collect, use, and process your data according to our Privacy Policy.
Don't worry - we never sell or share email addresses!