Threshold Learning Center (TLC) is a non-profit organization offering hands-on science curriculum in Astronomy, Geology, Archaeology, Ecology, and Environmental Science.  In addition to Youth Field Schools, TLC serves as a Retreat Center for meetings, seminars and workshops; a barn dormitory for overnight stays, similar to a Bed and Breakfast; a site for recreation and team building for students and adults; a space for relaxation, growth and entertainment for families.