NOTHING IS AS SIMPLE AS IT SEEMS, ESPECIALLY when the subject is water. At Dogwood Elementary School in Knoxville, Tenn., third-grade students use an Internet-based lesson to learn about H 2 O. .

For a Google version of this lesson plan, click here. (Note: you will need to make a copy of the document to edit it). Background. In 1967, Martin Luther King Jr and the Southern Christian ...