[header] How to karate chop [title] Place the wood (or brick) on two stable chopping blocks, with the wood grain running in the same direction as the way your hand is facing to chop. [step] Chopping with the grain makes the wood easier to break. [substeps] Choose thin, smooth board for chopping, such as slim pine boards. 
Don't try to chop anything that is too thick or hard (3 " maximum is suggested to start). A cinder block may be possible if you have been training for a few weeks and yell very loudly when making contact.