This article was written by the Christ Church Cathedral, Dublin, The Ringers Society, Education Committee in January 2005.

Here is the work for each bell for a bob course of Grandsire Triples.  Note that a bob course is shorter than  a plain course.

A bob changes your usual piece of work to another piece of work.  How your work is changed in general is available on a web site bellring.co.uk, we will just list what you do for a bob course.