have you tried www.khanacademy.org
<span>Latif wants to frame one of his photographs. He
wants to use the MATTED framing style where the mat keeps the glass and photo
apart.
It is one of the most common framing styles: the back mat and photo corners help
keep the photo flattened, while the front mat keeps the photo from touching the
glass. This style also makes it easy to transfer the work into and out of the
frame. </span>
<span>Zenmap's topology tab displays a "Bubble Chart" that shows the relative size and connection type of all discovered IP hosts.
</span>A kind of chart which
shows three dimensional data is known as Bubble chart. It also can be seen as
the variation of scatter plot where bubbles replace the data points.
