The classroom notes are ‘a truly distinctive feature of IJMEST… provid(ing) a space for short articles highlighting a single, unusual and interesting result, an alternative method, or a creative approach to teaching a particular mathematical idea. These articles are intended to provoke ideas that will support our teaching of mathematics at school or university level, and I would like to encourage authors to continue to submit these to the journal.’‘Colin Foster, Editor-in-Chief of IJMEST (Editorial 50.1)’