Welcome to my 95th gems post. This is where I share some of the latest news, ideas and resources for maths teachers. 1. Non-ExamplesNon-examples are a really good way of pre-empting common misconceptions and giving students unambiguous definitions and explanations. It’s great that Jonathan Hall (@StudyMaths) – creator of mathsbot.com and formtimeideas.com – has launched another new website: nonexamples.com. Knowing Jonathan this will grow quickly and become a really useful teaching tool. 2. Rich Number Tasks Thanks to Murat Tepe (@mappsandgrapps)…