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23 problems, 5 articles, 11 general resources, 4 Lists, 11 from Stage 1, 23 from Stage 2, 20 from Stage 3, 13 from Stage 4, 5 from Stage 5

Advent Calendar 2011 - a mathematical activity for each day during the run-up to Christmas.

The 2012 primary advent calendar features twenty-four of our posters, one for each day in the run-up to Christmas.

How could Penny, Tom and Matthew work out how many chocolates there are in different sized boxes?

Advent Calendar 2012 - a mathematical activity for each day during the run-up to Christmas.

Explore a task from our Wild site on each day in the run up to Christmas

Find all the ways to cut out a 'net' of six squares that can be folded into a cube.

Christmas trees are planted in a rectangular array of 10 rows and 12 columns. The farmer chooses the shortest tree in each of the columns... the tallest tree from each of the rows ... Which is. . . .

Vera is shopping at a market with these coins in her purse. Which things could she give exactly the right amount for?

Our 2008 Advent Calendar has a 'Making Maths' activity for every day in the run-up to Christmas.

Advent Calendar 2010 - a mathematical game for every day during the run-up to Christmas.

All the activities in the 2013 advent calendar are based on the theme of planet earth.

Advent Calendar 2010 - a mathematical game for every day during the run-up to Christmas.

All the activities in this year's primary Advent Calendar have a food or drink theme. Yum yum!

NRICH December 2007 advent calendar - a new Sudoku for each day in the run-up to Christmas.

This advent calendar contains twenty-four tasks for the run-up to Christmas, each one encouraging mathematical creativity.

NRICH December 2006 advent calendar - a new tangram for each day in the run-up to Christmas.

A story for students about adding powers of integers - with a festive twist.

Problems about mathematical modelling for use with Stage 3 and 4 students.

Work on these problems to improve your mathematical modelling skills.

A collection of our favourite pictorial problems, one for each day of Advent.

Twenty-four tasks for the run-up to Christmas, each one encouraging you to develop mathematical 'habits of mind'.

What size square should you cut out of each corner of a 10 x 10 grid to make the box that would hold the greatest number of cubes?

A mathematical challenge for each day during the run-up to Christmas.

This article explains how to make your own magic square to mark a special occasion with the special date of your choice on the top line.

From a group of any 4 students in a class of 30, each has exchanged Christmas cards with the other three. Show that some students have exchanged cards with all the other students in the class. How. . . .

All the girls would like a puzzle each for Christmas and all the boys would like a book each. Solve the riddle to find out how many puzzles and books Santa left.

Can you fit the tangram pieces into the outline of Little Ming and Little Fung dancing?

If these elves wear a different outfit every day for as many days as possible, how many days can their fun last?

What can you create using 140 characters and our cool Twilgo environment?

Use the clues to find out who's who in the family, to fill in the family tree and to find out which of the family members are mathematicians and which are not.

This problem explores the biology behind Rudolph's glowing red nose.

The triangle ABC is equilateral. The arc AB has centre C, the arc BC has centre A and the arc CA has centre B. Explain how and why this shape can roll along between two parallel tracks.

We need to wrap up this cube-shaped present, remembering that we can have no overlaps. What shapes can you find to use?

Using these kite and dart templates, you could try to recreate part of Penrose's famous tessellation or design one yourself.

Read this article to find out the mathematical method for working out what day of the week each particular date fell on back as far as 1700.

Here is a collection of puzzles about Sam's shop sent in by club members. Perhaps you can make up more puzzles, find formulas or find general methods.

Follow these instructions to make a three-piece and/or seven-piece tangram.

A collection of short Stage 3 problems on area and volume.

Doug has just finished the first year of his undergraduate engineering course at Cambridge University. Here he gives his perspectives on engineering.

In this article for primary teachers, Fran describes her passion for paper folding as a springboard for mathematics.