On Time!

This article discusses the concept of time and its measurement. Time presents many math challenges from computing geologic eras to measuring parts of a second. It has presented all kinds of technological challenges, both in history and today. However, when people looked for concepts of time in Standards and curricula, they found them embedded in other topics, almost hidden away. Some of the expectations that relate to the teaching of clock hours are remarkably low. A group of New England states working on common testing note that second graders should know about hours and intervals of fifteen minutes.