University of Arizona: Mount Graham International Observatory
The University of Arizona

These webcams provide a view of the sky conditions as well as the amount of precipitation that might be present.

The University of Arizona Cooper Center for Environmental Learning: Free Virtual Field Trip Exper...
The University of Arizona

The Cooper Center for Environmental Learning, known to many as “Camp Cooper,” is offering free virtual field trip experiences for students in grades Pre-K – 8.

The University of Arizona Laboratory of Tree-Ring Research: Tree-Ring Basics
The University of Arizona

Learn basic information about the study of tree rings.

The University of Arizona Laboratory of Tree-Ring Research: Try Crossdating Online
The University of Arizona

The “Try Crossdating Yourself!” online tutorial, teaches you the basic technique of crossdating using the “skeleton plot” method.

The University of Arizona Laboratory of Tree-Ring Research: Print Tree-Ring Exercises
The University of Arizona

Obtain instructional exercises that help novices and experts hone their cross dating skills. Try a range of difficulties and applications.