"This idea [induction] may sound simple, but it is difficult to implement."

"there is an inductive logic of discovery. And the way to make science intelligible and fascinating is to present the discovery process."

"[To understand science] We must develop a connecting link—which is more than observation but less than theory."

"The student has no way of independently judging the truth or falsehood of what he is told."

"there is no conflict between teaching content and teaching method; only the union of the two gives the child what he needs. "

"This course is an unusual combination of elementary science and advanced epistemology."