The students, who are all following a technological programme, have been using their own TI-NspireTM handhelds since September 2008 and I started to use TI-Nspire Navigator with them in May 2009. 
Initially, there were a number of students who were unsure about how to generate a linear function to go through a given coordinate point and by using the Screen Capture view they were able to see how to get started. It also let me see who needed my support. The Quick Polls encouraged all of the students to give their opinion and, from this I was able to see students change their point of view as they listened to my explanations and the other students’ reasoning. The students showed that they were beginning to really understand why a particular coordinate point lay on a particular straight line and how to find the equation of a straight line through a given point