Hi, I'm working on a new set of simple, ecological modeling exercises for our campus' undergraduate Introductory Biology lab series. The students work with simple population models by looking at graphs and seeing how changing parameter values and initial population sizes changes how the populations fluctuate through time. Does anyone know of an existing R GUI or any other interface that would be good for an undergraduate setting? Basically I want something that shows the students the model's output as graphs and lets them change parameter values but the equations/coding itself is hidden such that they can't change any of that. I want what Populus can do (a fantastic program written for this exact purpose, info here: http://www.cbs.umn.edu/research/resources/populus) but I want to be able to upload data so the students can compare model outputs to real data and I can't figure out how to get Populus to plot data. Any help would be very much appreciated! Thank you! Sincerely, Louise Stevenson Graduate Student, University of California, Santa Barbara Department of Ecology, Evolution and Marine Biology