🎄CESI’s 10 Days of Christmas 🎄
sarah-jayne carey
🎄CESI’s 10 Days of Christmas 🎄
It’s that time of year again so for the next 10 days, we’ll share a resource each day to make your classroom a little more interactive.
To kick it all off we have 3 Advent calendars 🎁📆
1. Coding with Python
2. Primary Maths
3. Secondary Maths
1. 🎄CSUK’s Advent Coding Challenge 2025
Perfect for short bursts of python coding fun or as an extension activity.
2. 🎄University of Cambridge Maths and Problem Solving Advent Calendars- Primary
Advent Calendar 2025 - Primary | NRICH
3. 🎄University of Cambridge Maths and Problem Solving Advent Calendars- Secondary:
Advent Calendar 2025 - Secondary | NRICH
Stay tuned for more resources coming your way tomorrow. 🎅🤶🎄
sarah-jayne carey
CESI’s 10 Days of Christmas
Day 2 of Cesi’s 10 days of Christmas and today we bring you some digital word games:
🎄Firstly Tiled Words- https://tiledwords.com/ I like this one as you can see past puzzles, simple layout- no ads- and the How To Play is very clear
🎄Secondly, Waffle Game https://wafflegame.net/daily Like Wordle and has a Daily Waffle and can build difficulty with a Deluxe Waffle , plus you can go to the archive to see past puzzles-has some ads.
🎄Lastly a Christmas themed site with Wordle puzzle, as well of lots of other nice Christmas info/resources/activities for use in the classroom. No ads, and a section for teachers.
https://www.whychristmas.com/fun/wordle
sarah-jayne carey
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Simon Lewis
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sarah-jayne carey
CESI’s 10 Days of Christmas 
Day 4 of Cesi’s 10 days of Christmas and today we bring you some coding:
🎄Turing Lab is a really good site for introducing coding and Python- suitable for both primary and secondary. They have updated it with extra content-GCSE revision packs on Computer Systems and Computational Thinking and end of unit assessments and extension tasks.
They also have some nice Christmas Themed activities: https://www.turinglab.co.uk/content
🎁Bonus 🎁 Institute Of Engineering and technology:
🎄UK Institute Of Engineering and technology site has resources for Primary and Secondary STEM in schools.-
🎄Can be filtered by age, or by time activity takes
🎄STEM Christmas Activities- lots of Unplugged
https://education.theiet.org/campaigns/christmas-teaching-resources
and Primary Christmas Activities to do in school and at home. Enjoy !
sarah-jayne carey
CESI’s 10 Days of Christmas 
Day 5 of Cesi’s 10 days of Christmas and today we bring you some festive coding:
1. The Grinch Hour of Code- https://www.grinchhourofcode.com/game.html
🎄No need to login or sign up
🎄Lovely way to introduce students of all ages to block Coding: "Help the Grinch return all the presents he stole from the residents of Whoville".
2. Code with Anna and Elsa- Code.Org
We include this every year- Code.Org’s Code with Anna and Elsa: https://studio.code.org/s/frozen/lessons/1/levels/1
🎄Great for this time of year- and many teachers new to CS may not have used it before. This one is all about drawing snowflakes in the Ice.
🎄Great for Maths- learning about angles and actually does get quite difficult.
🎄Plus with the sound of Elsa's skates on the
ice is sooo Christmassy
🎁Bonus 🎁 The Maths Inside the 12 Days of Christmas
For everyone who wonders how many gifts were given in total
https://www.mathscareers.org.uk/the-maths-inside-the-twelve-days-of-christmas/
sarah-jayne carey
🎄CESI’s 10 Days of Christmas 🎄
The best time to plant a tree was 20 years ago. The second best time is now Chinese Proverb
Day 6 of Cesi’s 10 days of Christmas. Today we have engaging, ready-made activities that connect micro-Bit coding with real-world sustainability.
🎄All free, and you have to sign up to download the PDFs.
🎄There is one is particularly useful resource for anyone with 6th Year Computer Science Students- Lovely basic project to measure soil moisture and light level EcoCode - Plant Partner | Digitall
🎄And also a whole set of resources on data logging using a microbit.
Coding For Climate Action 🌸 | Digitall
sarah-jayne carey
CESI’s 10 Days of Christmas 
Day 7 and Day 8 of Cesi’s 10 days of Christmas - just because 😁
Lots of people loving Day 3's challenges so we are powering up the frustration levels with two more:
Day 7
https://little-dot.toxicode.fr/
🎄this one is definitely a step up
🎄using the arrows and space bar on the keyboard, you have to follow the instructions to unlock each level.
Day 8
This is for all wannabe number crunchers- It is similar to countdown if anyone is familiar with that- video here: https://youtu.be/_JQYYz92-Uk?si=O-WvY1E2nJIllvgm&t=7
🎄You have to work out how to get from one number to another
🎄Great brain training for those of us who might need it and would be amazing as a starter or finisher activity in a classroom.
🎄I am keeping this one for my first class back in January- will defo get their brains working again! 🎁🎅🎉.
https://www.toxicode.fr/black_box
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sarah-jayne carey
CESI’s 10 Days of Christmas
Day 9 of Cesi’s 10 days of Christmas and today we bring you some Maths-
12 lovely Maths teasers for both Primary and Secondary.
And lastly a Snowflake Generator
https://www.transum.org/Maths/Activity/Snowflake/
Just One Day to go- but you can use some of these all year round.
sarah-jayne carey
🎄CESI’s 10 Days of Christmas 🎄
Day 10: Podcast for of us who will be living in traffic for the next few days
We hope you are all winding down for the year and about to get some rest with your loved ones.
🎄However, if you need a podcast for a winter walk or a dark commute, check out the latest TeachNet Ireland podcast hosted by Pat Brennan.
https://teachnet.ie/26-the-cesicon26-podcast/
🎄Reasons why you should all come to the CESI conference 2026 in Limerick
🎄 Our keynote speaker Elaine Burke talks all things AI in schools.
We hope you enjoyed this years 10 days and that you will get some use out of tools and sites shared.
Happy Christmas 🎄🤶🦌
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