half of the classes clapping their hands in a circle counting from one to thirty all multiples of three are substituted with the word pain then they move to multiples of. the other half of the class is at the blackboard they listen to the group in the circle and try to recognize the pattern. also. notice immediately that the pattern has to have a certain amount of regularity but if you follow the game and your multiples of three exercise it's easier because you always see the same person but with the multiples of four there are always different. i thought the experiment was good. it's good that you can combine math and music on the one hand you have to collapse the rhythm properly and on the other you have to think about the multiples. perhaps there will soon be a subject called math and you sick until then students can learn arithmetic with