Two long ropes and some academic questions
The two long ropes are placed on the floor in circles and represent respectively a ‘yes-circle’ and a ‘no-circle’. The teacher (or an individual student) makes a number of academic questions that can be answered with ‘yes’ or ‘no’. The teacher gives a question and the students place themselves in one of the circles within 10 seconds. The students then justify their answer before the teacher gives the correct answer. For every right answer the students get a point.