Introducing TI-Navigator led to more questions being asked which often led to discussions.  Also, students often interpreted questions differently.  This allowed for even more discussion.

Introducing TI-Navigator led to more questions being asked which often led to discussions. Also, students often interpreted questions differently. This allowed for even more discussion because students were able to ask each other questions and explain themselves. Students also voiced their opinions more and questions were a lot more in depth. Students also began to argue which forced them to find supporting arguments to support what they were saying. In the end, this forced them to discuss more amongst themselves.

Excerpt of Masters Thesis at York University, Toronto, Canada:
Bentivoglio, Catherine (2007), Introduction of Graphics Calculators and the TI-Navigator in a Senior Elementary Classroom: Effects on Student Attitudes and Teaching Practice. Toronto, Canada: York University.