Class Tools.net has a great interactive 3 circle Venn diagram....

Class Tools.net has a great interactive 3 circle Venn diagram....

 There is also an online Venn Diagram that students seem to love working with.  The problem is that printing doesn't turn out that well.  So doing a screen shot with a Mac (control-shift-4) and sending the picture to your teacher will work just as well.  If you use the save feature it downloads the HTML file to send.  You need to open up Safari and do File/open and find the file to open up.  It will then give you the email address to give to your teacher to see your file.  See above to see the actual venn diagram.  Try it.