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

Advent Calendar 2012 - a mathematical activity for each 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.

Enjoy a video each day in the run up to Christmas with our Secondary Advent Calendar!

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

Rather than using the numbers 1-9, this sudoku uses the nine different letters used to make the words "Advent Calendar".

Twenty four tasks to count down to Christmas.

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

A mathematical challenge 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

Twenty-four tasks for the run-up to Christmas.

Twenty-four tasks for the run-up to Christmas.

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

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

Calendars were one of the earliest calculating devices developed by civilizations. Find out about the Mayan calendar in this article.

In this section from a calendar, put a square box around the 1st, 2nd, 8th and 9th. Add all the pairs of numbers. What do you notice about the answers?

Don't get rid of your old calendars! You can get a lot more mathematical mileage out of them before they are thrown away. These activities, using cut up dates from the calendar, provide numbers to. . . .

Make a pair of cubes that can be moved to show all the days of the month from the 1st to the 31st.

Choose any three by three square of dates on a calendar page...

Try adding together the dates of all the days in one week. Now multiply the first date by 7 and add 21. Can you explain what happens?

Try these treasures to celebrate NRICH's 20th birthday

Bernard Bagnall recommends some primary school problems which use numbers from the environment around us, from clocks to house numbers.

Here is your chance to investigate the number 28 using shapes, cubes ... in fact anything at all.

The tasks in this feature encourage you to play and explore, then think deeply about the mathematical ideas underneath.

The problems in this feature will help to inspire your learners to be playful, become engaged, and then think deeply about the mathematical contexts that underpin them.

Mr. Sunshine tells the children they will have 2 hours of homework. After several calculations, Harry says he hasn't got time to do this homework. Can you see where his reasoning is wrong?

The pages of my calendar have got mixed up. Can you sort them out?

Consider how alternative representations can help us to understand the underlying mathematical concepts.

This activity encourages children to think about times of day and the order in which they do different activities throughout the day.

Read about the history behind April Fool's Day.

Can you design a new shape for the twenty-eight squares and arrange the numbers in a logical way? What patterns do you notice?

July 1st 2001 was on a Sunday. July 1st 2002 was on a Monday. When did July 1st fall on a Monday again?

In this activity, children can practise reading numbers and counting items in order to help Owl pack for his holiday.

What mathematical structures do you notice as you explore these problems?

Can you fit the tangram pieces into the outlines of the numbers?

Problems about exploring and noticing structure for use with Stage 3 and 4 students.

Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of man's need to measure things.