Grade Crystals

Famous quotes containing the words grade and/or crystals:

“Ideas are like pizza dough, made to be tossed around, and nearly every book represents what my son’s third grade teacher refers to as a “teachable moment.””
—Anna Quindlen (b. 1952)

“It is clear that everybody interested in science must be interested in world 3 objects. A physical scientist, to start with, may be interested mainly in world 1 objects—say crystals and X-rays. But very soon he must realize how much depends on our interpretation of the facts, that is, on our theories, and so on world 3 objects. Similarly, a historian of science, or a philosopher interested in science must be largely a student of world 3 objects.”
—Karl Popper (1902–1994)