In this episode of MathsTalk, Leanne and Marcus chat to recent CHOOSEMATHS Schools Outreach Officer and current secondary mathematics teacher Jacinta Blencowe about why allowing students to talk about their mathematical working and understanding is such a critical element in their maths education. They discuss the ways in which parents and teachers can develop children’s mathematical language and vocabulary and also provide some practical tips, resources and strategies for encouraging useful and productive discourse around mathematical working and problem solving.