Caeser Cipher
The Caesar Cipher has a long history of usage, dating back to Julius Ceasar (100BC-44 BC). The cipher works by substituting for each letter the letter that is n letters further along the alphabet, where n is the key.
Tetrominoes
A polyomino is a plane geometric figure formed by joining one or more equal squares edge to edge. Polyominoes have connections with various themes in geometry, symmetry, tiling, perimeter, and area.
Pirate Game
Pirate Game This activity is not suitable for mobile phones. We recommend using a computer and full screen mode for a better experience. This is a long activity that mixes literacy and maths with storytelling and puzzles to solve. We recommend teachers to use it as a team activity and project it on [...]
D24 – Origami Hat
Christmas Hat Origami Back to Advent Calendar Christmas Hat Origami Back to Resources Start with square paper and follow the instructions. Use a paper coloured on one side, or use a plain white one and colour it later. Use a large square to [...]
D23 – Riddle12
Christmas Mystery Box Back to the calendar Christmas Mystery Box Back to Resources The precious map of Santa's journey is safely locked away. Say the magic word and the box will open! Unfortunately, Santa has memory problems! But don't worry the clever elves [...]
D22 – Pictoku
Christmas Pictoku Back to Resources Complete the grid by dragging the correct picture. No picture may appear twice in any row or column. Use the 'Check' button to verify your answers. Use the blue arrows to try different puzzles. Download a paper version instructions at the bottom of the page. [...]
D20 – programming
Flower watering programme Back to calendar Flower watering programme Back to Resources A lazy but clever elf wants to program his robot to take a nap while the robot waters his plants. Help him by correctly ordering the different commands. Use the ‘Check’ [...]
D19 – Survey
Christmas Survey Back to calendar Christmas Survey Back to Resources Before Christmas, an elf was sent out to carefully survey the streets of a small town. He marked his route by drawing the houses he came across. Unfortunately, they got mixed up. [...]
D18 – Riddle11: snow problem
Snow Problem Back to the calendar Snow Problem Back to Resources Which event is most likely to happen? An idea from the book Think Twice by Alex Bellos Use the 'Check' button to verify your answer. [...]
D17 – sense numbers
Sense of Numbers Back to calendar Sense of Numbers Back to Resources Everyone is able to feel approximate quantities and to make simple calculations of these quantities. It doesn't matter what culture or age you're from, whether you know the names of the [...]