Later, during the writing of the new textbooks, attention was specially devoted to training students in the process of thinking. He feels that in an age in which everybody owns a calculator, "Being able to do mathematical calculations per se is not important. What matters is why certain calculations are done.
後來編新教材時便特別注意思考過程的訓練，他認為，在人手一台計算機的時代，「計算本身不重要，重要的是為什麼要這樣計算？