We've had several reports that TopHat vendors are contacting UNI faculty to try to get faculty to use their product. TopHat is an Audience Response System (clickers) similar to Poll Everywhere, our officially supported product at UNI. TopHat's model is to tell faculty it is "free" to them but their students end up paying $30 per person/per semester. We recommend that you do not engage them as they are very aggressive salespeople. If you have any questions about Poll Everywhere or TopHat, please feel free to contact us.