Later I used a Learning Catalytics "composite sketch" question. Students can use their mouse or touch screen to indicate a point or draw a line on their device. The results are aggregated into a single response by overlaying all the individual responses. To emulate a "classroom walkthrough" I shared a sample lesson and asked teachers to plot their perceptions of its rigor and relevance on an X / Y axis. The resulting overlay graph of the variance in their responses (at left) was a powerful discussion starter.
The system has an array of powerful response monitoring and reporting tools, and it's a standout at fostering peer discussion. Teachers can easily create a student seat map and use it to quickly see who "gets it." Learning Catalytics can review student responses and direct them to discuss their answers with nearby peers who may have different views. It even send out a message telling them to talk with specific class members. "Cameron turn to your right and talk to Zoe about your answer." Questions can be asked multiple times and students can teach their peers before the next re-polling. Collaborative learning is one of the driving principles behind Learning Catalytics.
A longer version of this story appeared on Peter Pappas' blog Copy Paste