Continuing the series of articles on teaching mathematics with technology, this article furthers the authors' exploration of the use of a range of mobile technologies to enhance teachers' practices in the primary mathematics classroom. In Part 1 of this article, the authors explored the use of the iPod Touch and iPad. In Part 2, they explore global positioning system (GPS) devices and a range of other hand-held devices. (Contains 3 figures.) [For Part 1, see EJ961656.]