Page 1 of this flipchart contains 10,000 dots - 10 rows of 10 squares, where each square consists of 10 rows of 10 dots. 10 x 10 x 10 x 10 = 10,000.

On page 2, I shrank the big square of dots on page 1, and then made a square that consists of 10 rows, each containing 10 of these squares, or 100 squares altogether. 10,000 x 100 = 1,000,000! So this page actually contains 1 million dots.

If you use the ActivStudio zoom tool, you can zoom in enough to see the original dots. Interesting side note - the file is only 10.02 KB.

A really really cool interactive game to practise number properties. Thirty particles fall from above. Use the repelling particle to nudge them into the correct box depending on whether they contain a square number or a prime number.

An interactive whiteboard game to practise number properties. Thirty particles fall from above. Use the repelling particle to nudge them into the correct box depending on whether they contain a square number or a prime number.

Three thumbs up!

Instructions
http://www.teacherled.com/2008/09/02/particle-maths/

Resource
http://www.teacherled.com/resources/particle/particleload.html

A neat visual way to find the LCM (lowest common multiple) of two numbers.

http://www.teacherled.com/resources/LCM/LCMload.html

Click on the numbers to complete the sequence.
http://www.oswego.org/ocsd-web/games/spookyseq/spookytrino.html

Ghost Evens
Click on the even numbers repeatedly to rack up your score.
http://www.oswego.org/ocsd-web/games/Ghostblasterseven/ghosteven.html

Ghost Odds
Click on the odd numbers repeatedly to rack up your score.
http://www.oswego.org/ocsd-web/games/GhostblastersOdd/ghostodd.html

Three thumbs up!

Estimate the position of a given number on a number line. Levels 1 to 4 are whole numbers, while levels 5 to 8 are decimals.

http://www.oswego.org/ocsd-web/games/Estimate/estimate.html

Type in a big number. Now say it. Check your answer using the website.
Now type in a really big number, say it, and check your answer.
Now type in a really, really big number, say it, and check your answer.
And so on ....

What is the biggest number you can say correctly?

http://www.mathcats.com/explore/reallybignumbers.html

The computer will generate a number. To play, you simply drag and drop the arrow to where you think that number is within the range of numbers shown.

You'll get 3 lives for each question. If you get the answer right first time, you get 3 points, but every time you lose a life you lose a point. There are ten questions in each of the three levels, and you need 25 out of 30 to go up a level, so look after those lives!

Note:
* This game requires the Shockwave plug-in, available from the website.

http://www.channel4learning.net/sites/puzzlemaths/pinpoint.shtml

A Java implementation of Cuisinaire Rods. Very nicely done.
http://arcytech.org/java/integers/integers.html

A Java implementation of Base 10 Blocks. Very nicely done.
http://interactivemaths.net/beta/node/add/whiteboard-content