Gretchen began teaching at CGCC in 2011 and has been teaching at PCC since 2008, as well as teaching labs during her Graduate and Undergraduate school careers.

She teaches the G 200 course series which includes G 201 - Physical Geology - Materials (rocks, minerals, volcanoes, earthquakes, plate tectonics), G 202 Physical Geology - Surficial Processes (Rivers, glaciers, groundwater, coastlines, etc), and G 203 - Physical Geology - Historical (major events in Earth's history).  She also teaches the General Science course series as an online hybrid: GS 106 - Geology, GS 108 - Oceanography, and GS 109 - Meteorology, as well as G 207 - Geology of the Pacific Northwest.