Can You Build the Best Boat? 
NCTM, Salt Lake City 2008 
(Darl Rassi, Matt Kaufmann)

Teaching Through Activity, 2008
(Darl Rassi, Matt Kaufmann)

The Boat Challenge
ICTM 2007
(Darl Rassi, Matt Kaufmann)

The Boat Challenge
NCTM, Atlanta 2007
(Darl Rassi, Matt Kaufmann)

Teaching Through Activity 2007
 (Darl Rassi, Matt Kaufmann)