参考答案

正确答案：C
解析：从“Several teachers，in the privacy of their own classrooms，contravened the official curriculum to teach the problem-solving formulas that constructivist math denigrates as mindless memorization．”这句话中，我们得知，构建主义者认为传统数学是无意思的记忆，所以从原文无法得到此句的信息，即NG。