10 MC unusually phrased questions that require students to compare two types of graph: d-t,v-t and a-t graph. Challenge students to reflect on their understanding of these graphs. As a starter activity allow 10 minutes for individual students to answer the 10 questions. As and AFL activity this delivers peer assessment when you ask students to check and discuss each other's answers. As a 'talk to learn' strategy allow students 5-10 minutes to argue for or against their answer. Detect general misconceptions or identify students with fundamental problems in this unit and plan an intervention lesson, or work with them while other students work on exam practise questions. Buy 'AS motion challenge' resource for additional differentiation. Raise your T+L impact in your class for £2.