I was recently asked to explain eye tracking to 4th grade students and talk to them about its applications.What is eye tracking?An eye tracker is a device that uses projection patterns and optical  sensors to gather data about gaze direction or eye movements with very  high accuracy. Most eye trackers are based on the fundamental  principle of corneal-reflection tracking:I did not have time to prepare an activity, and I showed them some videos and they asked me questions. They got it, but I don't believe this is the best introduction.I was thinking something along the lines of Christopher Bishop's Royal Institution Christmas Lectures with volunteers and physical objects.How would you explain it to 9-10 year olds?
Explaining eye tracking to 9-10 year olds
education