I am looking for some new mental oral starter ideas. Could we start a good list. 1. My favourite is the mystery number boys vs girls challenge. I write down a mystery number and tell them what number it is between e.g. it is between 0 and 100. They then have to use correct vocabulary to ask questions to work it out e.g. is it odd, even, is it a mutliple of __, Is it greater than __ etc. They love it because they want to beat the others, particualrly because it is boys vs girls. Anyone else?