It goes without saying that the terms people use in their daily discourse constantly change. Today the term "nursery school" is referred to as preschool and Pre-K. Perhaps it reflects the contemporary view that the main mission of early education is preparation for school, i.e. "school readiness." But that particular shift in terms is not as…

All teachers of all subjects at all levels have to address the question: What should be learned? Their answers to this question depend in part on the ages of the learners. Teachers' answers at the secondary school level are typically formulated in terms of the specific subjects they teach. Those teaching at the primary school level usually respond…