Everyday occurrences with evaporation are so ordinary that adults may not realize that children wonder about them and create explanations about what happens to water as wet objects dry. The process of evaporation is not visible, making it hard for young children to understand. Because they like to look for clues and participate in group…

Three years after calling for a reordering of elementary and middle school math curricula, the nation's largest group of math teachers is urging a new approach to high school instruction, one that aims to build students' ability to choose and apply the most effective problem-solving techniques, in the classroom and in life. Cultivating those…