Follow the lesson on the site http://www.learnalberta.ca/Math/math6web/math6shell.swf
and complete the problems.
Complete the two sections found on the page. http://www.oswego.org/testprep/
topic.cfm?TopicID=78 What is the volume of the shapes?
Don't forget the review.
Have a look at http://www.shodor.org/interactivate/activities/sa_volume/index.html
and alter the size of the sides to see how this changes the volume.
Construct online at
http://ejad.best.vwh.net/java/patterns/patterns_j.shtml
the patterns below.
Try other shapes on this page  http://clarkjag.idx.com.au/PolyPages/index.htm?Polycubes.html
Write down their volume. Check your results with the person next
to you.
Go to the page at
http://illuminations.nctm.org/mathlets/cubes/
Make some of the cubes.
Work out the volume of these shapes. Check you answer with your neighbours.
Review as required.
You may need to work these out by construction the parts at the
sites below and then adding.
Construct online at http://ejad.best.vwh.net/java/patterns/patterns_j.shtml
or
http://www.arcytech.org/java/b10blocks/b10blocks.html
as many shapes as you can from 5 cubes
Check and discuss with your neighbour your results.
Finish off by trying this activity http://www.nzmaths.co.nz/BrightSparks/tonisTiara.asp?applet
And http://www.math.ubc.ca/~morey/java/copycat/everything/
You may also enjoy this simulation at http://www.mste.uiuc.edu/carvell/3dbox/default.html
