In looking for fun games to engage my students, I came across Sara Van Der Werf‘s 5×5 Game. She has explained the game very well in her blog post, and so I suggest you read about it there. Please make sure to follow her sharing request for this game. I have made a Smartboard Notebook file to use with this game, and you can access it here. In my Notebook file, I have added light blue squares to write the sums, and I have added thinking questions for the students to consider in between the rounds. I will still use her student handout template which can be accessed in her blog post.
Thank you for sharing, Sara!