http://sciencekit.com/the-sun-tracker/p/IG0030697/"Tracker will increase the power output of photovoltaic arrays by over 200% (solar panels not included), by keeping the face of the panels parallel to the sun throughout the day."
I wonder whether I could possibly get 200%? A Madison, WI program determined that their dual-axis tracking PV installations gained 30% by tracking:
What do you think? Would you like to have your students try the Science Kit equipment?