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

The computer starts with all the lights off, but then clicks 3, 4 or 5 times at random, leaving some lights on. Can you switch them off again?

A game for 2 people. Take turns joining two dots, until your opponent is unable to move.

Solve this Sudoku puzzle whose clues are in the form of sums of the numbers which should appear in diagonal opposite cells.

Here is a version of the game 'Happy Families' for you to make and play.

Nim-7 game for an adult and child. Who will be the one to take the last counter?

A game for 2 players. Can be played online. One player has 1 red counter, the other has 4 blue. The red counter needs to reach the other side, and the blue needs to trap the red.

Can you work out how to win this game of Nim? Does it matter if you go first or second?

A Sudoku with clues given as sums of entries.

A game for 2 players. Given a board of dots in a grid pattern, players take turns drawing a line by connecting 2 adjacent dots. Your goal is to complete more squares than your opponent.

Try this version of Snap with a friend - do you know the order of the days of the week?

Try this matching game which will help you recognise different ways of saying the same time interval.

Exchange the positions of the two sets of counters in the least possible number of moves

In this matching game, you have to decide how long different events take.

In this game for two players, you throw two dice and find the product. How many shapes can you draw on the grid which have that area or perimeter?

Can you make the birds from the egg tangram?

Unmultiply is a game of quick estimation. You need to find two numbers that multiply together to something close to the given target - fast! 10 levels with a high scores table.

A game for 1 person. Can you work out how the dice must be rolled from the start position to the finish? Play on line.

A game that tests your understanding of remainders.

A game somewhat similar to 'noughts and crosses' on a much larger space.

You'll need two dice to play this game against a partner. Will Incey Wincey make it to the top of the drain pipe or the bottom of the drain pipe first?

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

Incey Wincey Spider game for an adult and child. Will Incey get to the top of the drainpipe?

A game for 2 people. Take turns placing a counter on the star. You win when you have completed a line of 3 in your colour.

This article for teachers describes several games, found on the site, all of which have a related structure that can be used to develop the skills of strategic planning.

Can you use the numbers on the dice to reach your end of the number line before your partner beats you?

The aim of the game is to slide the green square from the top right hand corner to the bottom left hand corner in the least number of moves.

An extension of noughts and crosses in which the grid is enlarged and the length of the winning line can to altered to 3, 4 or 5.

Square It game for an adult and child. Can you come up with a way of always winning this game?

Hover your mouse over the counters to see which ones will be removed. Click to remover them. The winner is the last one to remove a counter. How you can make sure you win?

A game for two players. You'll need some counters and somewhere to draw a board.

A game for 1 or 2 people. Use the interactive version, or play with friends. Try to round up as many counters as possible.

There are nasty versions of this dice game but we'll start with the nice ones...

An ordinary set of dominoes can be laid out as a 7 by 4 magic rectangle in which all the spots in all the columns add to 24, while those in the rows add to 42. Try it! Now try the magic square...

Basic strategy games are particularly suitable as starting points for investigations. Players instinctively try to discover a winning strategy, and usually the best way to do this is to analyse. . . .

A shunting puzzle for 1 person. Swop the positions of the counters at the top and bottom of the board.

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

Take it in turns to place a domino on the grid. One to be placed horizontally and the other vertically. Can you make it impossible for your opponent to play?

Work out the fractions to match the cards with the same amount of money.