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.

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.

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

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

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.

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.

Can you make the birds from the egg tangram?

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

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

You'll need to know your number properties to win a game of Statement Snap...

Use the tangram pieces to make our pictures, or to design some of your own!

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.

Spiralling Decimals game for an adult and child. Can you get three decimals next to each other on the spiral before your partner?

The game uses a 3x3 square board. 2 players take turns to play, either placing a red on an empty square, or changing a red to orange, or orange to green. The player who forms 3 of 1 colour in a line. . . .

Use your knowledge of place value to try to win this game. How will you maximise your score?

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

Here are some more upper primary strategy games for you to play.

A game for 2 players. Given an arrangement of matchsticks, players take it is turns to remove a matchstick, along with all of the matchsticks that touch it.

A game for 1 person to develop stategy and shape and space awareness. 12 counters are placed on a board. Counters are removed one at a time. The aim is to be left with only 1 counter.

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

How long does it take to brush your teeth? Can you find the matching length of time?

A game for 2 players that can be played online. Players take it in turns to select a word from the 9 words given. The aim is to select all the occurrences of the same letter.

Can you beat the computer in the challenging strategy game?

Take turns to place a decimal number on the spiral. Can you get three consecutive numbers?

In this game for two players, the idea is to take it in turns to choose 1, 3, 5 or 7. The winner is the first to make the total 37.

This article outlines how strategy games can help children develop logical thinking, using examples from the NRICH website.

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?

A game for 2 players. Practises subtraction or other maths operations knowledge.

This article supplies teachers with information that may be useful in better understanding the nature of games and their role in teaching and learning mathematics.

Slide the pieces to move Khun Phaen past all the guards into the position on the right from which he can escape to freedom.

This article, the second in the series, looks at some different types of games and the sort of mathematical thinking they can develop.

Here is a chance to play a version of the classic Countdown Game.

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?

An article for teachers and pupils that encourages you to look at the mathematical properties of similar games.

Calculate the fractional amounts of money to match pairs of cards with the same value.

Two sudokus in one. Challenge yourself to make the necessary connections.

Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.

Four numbers on an intersection that need to be placed in the surrounding cells. That is all you need to know to solve this sudoku.

Two sudokus in one. Challenge yourself to make the necessary connections.

Collect as many diamonds as you can by drawing three straight lines.

A game for 2 players. Take turns to place a counter so that it occupies one of the lowest possible positions in the grid. The first player to complete a line of 4 wins.

Can you spot the similarities between this game and other games you know? The aim is to choose 3 numbers that total 15.

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

In this article for teachers, Liz Woodham describes the criteria she uses to choose mathematical games for the classroom and shares some examples from NRICH.

A train building game for two players. Can you be the one to complete the train?

This pair of linked Sudokus matches letters with numbers and hides a seasonal greeting. Can you find it?

Here are a collection of games from around the world to try during the holidays or the last few weeks of term.

A game to make and play based on the number line.