There’s certainly benefit to working with smaller groups.  We worked with just 55 students during this program, but these 5th graders got to do so many different activities, including our karst topography lab, and geology demos (below).

Above, students watch a rock dissolution demo. Photo by Vivian Loftin.

Above, students play with cave rescue phones as part of a lesson about basic electronics. Photo by Vivian Loftin.