So I love to adapt it. It's never quite as good as the original, but often the great structure of the original allows new features to come to light. Here's a previous handout that has the original Product Game and and Integer variation.
This class expects games from me, though. I thought we had played the product game already (that was last year, Mr. Golden!) - oops. In this version of the game, there's markers to make for your team. I didn't have my usual two color counters available, but I've also learned that making markers or game pieces is a point of engagement and pride for some of the students. Others are content with a quickly scrawled initial, and that's okay, too. Mr. Schiller set a time limit of 3 minutes for making your markers, which was a good idea and the right amount of time.
We were to start by playing me vs. the class, so I could model some of the multiplying strategies I wanted to share. But my son made me some excellent University of Michigan and Michigan State markers, and, being a proud alum, I had to be State. There were students who couldn't bring themselves to being on U of M's team, and how could I argue? So we played Spartans vs. Wolverines.
Product Game Decimal
It was interesting seeing them play. They started out almost entirely in whole x whole, and then were forced to the whole x tenths by the game play. And if the game went on long enough, to the hundredths. Several people got calculators to explore this, and a couple got to the calculators and then beyond them in the space of the hour. Some students were done with the game after one session, but others were definitely up for more. Hope you get a chance to try it and get a little bit addicted.
Photo credits: From Flickr, jeff_golden, 24oranges.nl and fireflythegreat.