Northwestern University, the Center for Talent Development’s Gifted
LearningLinks program is offering an online course which will allow
advanced high school students to earn university credit. 

The course
title is “Climate Catastrophes in Earth History: Earth 105“, offered
through the Earth & Planetary Science Department at Northwestern
University.  The course begins on March 29 and runs through June 11,
2010.  Registration is open now and closes on March 31st.

The Download Earth 105 explains more.