Grades are a subjective rating masquerading as an objective evaluation.

Non-cooperative approaches, by contrast, almost always involve duplication of effort, since someone working independently must spend time and skills on problems that already have been encountered and overcome by someone else. A technical hitch, for example, is more likely to be solved quickly and imaginatively if scientists (including scientists from different countries) pool their talents rather than compete against one another.

Most of us would protest that of course we love our children without any strings attached. But what counts is how things look from the perspective of the children

Saying you taught it but the student didn't learn it is like saying you sold it but the customer didn't buy it.

Educators remind us that what counts in a classroom is not what the teacher teaches; it’s what the learner learns.

Maximum difficulty isn't the same as optimal difficulty.

We learn most readily, most naturally, most effectively, when we start with the big picture - precisely when the basics don't come first.