Meters, kilograms, degrees Celsius. To most Americans, these units of measurement are little more than funny inconveniences on trips abroad. To scientists, they’re the very standards that allow for ...

In this educational film, a father explains to his son Tommy the importance of weights and measures in everyday life. As they prepare to set up a train set, the father illustrates how measurements are ...

Includes updates and/or revisions. After dropping for decades, average class sizes in American schools may be growing again as schools cope with budget shortfalls. Although some educators see the ...