Mr Trewartha

 

 "A teacher of mathematics has a great opportunity. If he fills his alloted time with drilling his students in routine operations he kills their interest, hampers their intellectual development, and misuses his opportunity. But if he challenges the curiosity of his students by setting them open problems proportionate to their knowledge, and helps them to solve their problems with stimulating questions, he may give them a taste for, and some means of, independent thinking" George Polya (eminent Hungarian mathematician), 1971