Each group needs:

• ~20 wooden pencils of varying (but consistent between groups) lengths, such as 7.5 inch (full-length) and 3.5 inch (golf)
• 1 grooved whiteboard-style marker tray that is 18.5 inches long and 0.375-inch wide (this width is preferred for a snug fit with standard wooden pencils); such as a piece of wood with a groove cut into it; the tray can be makeshift as long as the “grooved” condition is met
• 1 large sheet of paper or a small/portion of a whiteboard, on which to work out and then display mathematical arguments
• pencils or whiteboard markers