Opening up open-ended mathematics tasks

This discussion has evolved from ideas in Peter Sullivan and Pat Lilburn's Open-Ended Maths Activities; Using 'Good' Questions to Enhance Learning (1997). This is a compilation of open-ended questions, and methods for generating open-ended questions, along with a brief rationale for using such questions. This classroom-oriented teaching resource developed from earlier research and teaching development work by Peter Sullivan and David Clarke, and others. Two methods are offered for constructing a 'good question'.