Science Education Resource Center at Carleton College
Serc: Investigating Trees: Using a Dichotomous Key to Identify Local Tree Types
Using their own classification methods students will identify the types of trees found around their school and neighborhoods. Students will then present their classification methods to the class. Later students will use dichotomous tree...
Oregon State University
Oregon State University: Dichotomous Key
An excellent starting point. Get a good description of what the dichotomous key for tree identification is and then directions for using it to identify trees.
Science Education Resource Center at Carleton College
Serc: Tree Identification: Compare and Contrast Deciduous and Evergreen Leaves
Students observe differences in tree leaves leading them to an understanding of the terms deciduous, evergreen, and coniferous. Children will compare and contrast leaves and then, viewing a chart key, use what they know to help them...
Environmental Education for Kids
Eek!: Dichotomous Tree Key
Identify a tree using this interactive identification tool.