The document discusses key questions and a non-hands up policy used in a classroom. Key questions are asked by the teacher at the start of the lesson to get students thinking and reflecting, and working with peers. Key questions are useful for both students, to focus on important lesson points, and teachers, to assess student understanding and the effectiveness of teaching strategies. For the non-hands up policy, traffic light cards are used for students to privately indicate their understanding, and the teacher directly asks students questions to encourage all students to actively participate without fear of not knowing the answer. The aim is for every student to achieve the subject's goals with no one left behind.