Should start from kindergarten because if we cultivate, ranging from children. Children who grow up to be familiar with and to think that the analysis is not to modify the memory.
Should start at the primary If we cultivate young Children who grow up to be over and done with analytical thinking that can not be corrected by repetition.
Should start from the elementary school, because if we cultivate the young. Children who grow up to be used and with analytical thinking that don't need you to get solve by rote.