The 3rd annual World Math Day will take place on March 4, 2009. Children from around the world will be uniting to answer a record breaking number of mental arithmatic questions.  Unicef and 3D Learning have partnered to bring about this event, which is open to kids ages 5-18.  Practice is open now on the website and classrooms, homeschoolers or individual students are invited to register.  Are you ready to participate?