TI-Navigator played a complementary, if not prominent, role in students' experience of feedback in college algebra. 

The results of this study indicate the TI-Navigator provides opportunities for interaction among students through interactive activities, which can lead to positive students' perceptions and more informed feedback to instructors about students' understanding.

Powers, R. and J. Champion (2008). Teaching and Learning College Algebra with the TI-Navigator Wireless Handheld Network. Electronic Proceedings of the Twentieth Annual International Conference on Technology in Collegiate Mathematics. San Antonio, TX, ICTCM.

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http://archives.math.utk.edu/ICTCM/i/20/W017.html