THE ISSUE:

human activity has greatly changed nitrogen cycling and dynamics worldwide.

ECOLOGICAL CONTENT:

ecosystem, nitrogen cycle, global nitrogen cycling, nutrient loading, nitrogen saturation of forests.

STUDENT-ACTIVE APPROACHES:

write before discussion, pairs-share, jigsaw,

STUDENT ASSESSMENTS:

replot the data, essay quiz, newspaper article

AUTHOR:

Charlene D'Avanzo, School of Natural Sciences, Hampshire College, Amherst, MA, 01002, cdavanzo@hampshire.edu.