Investigating Arrays Using Bitstrips

I created another interactive comic using Bitstrips that would allow students to investigate arrays and multiplication. In this activity, students help Mr. Ro arrange desks into rows and columns for the first day of school (I know, I know, very teacher-directed seating arrangement) by clicking and dragging desks and into their desired position. The comic problem is open-ended to allow students to create arrays with 12 desks all the way up to 24 desks and to create a variety of arrays for the same number of desks. I have shared this activity in http://bitstripsforschools.com and I would love to get feedback on how this activity goes if you try it with your class.