Manga Math--A free math site that will knock your socks off!

My class is in love with this site...and so am I.  This is a "game" site that
works on all types of math skills.  I have been so impressed with the
growth my kiddos have made on their basic math skills.  Because a
little competition is built in, the kids are willing to work on their facts
outside of class time.  Even kids without internet access at home have
been going to our public library to participate.  The great thing
about this site is that is also allows connections between schools. Our class recently was challenged by a school in Ireland.  Talk about exciting.  Also, did I mention that is it free??  Check it out.  Here is
the link:
Manga High