Thinking and learning to think

For the purpose of testing the quality of gold alloy jewellers formerly used a fine-grained dark stone, called the touchstone. In the eyes of an educator good instruction is more precious than pure gold. The touchstone by which he tests the quality of instruction, so as to distinguish genuine teaching from its counterfeit, rote teaching, is thinking. The schoolmaster who teaches by rote is satisfied if the pupils repeat his words or those of the book; the true teacher sees to it that the pupils think the thoughts which the words convey.