Welcome to the Digital Library for Earth System Education A free service Thank you for your interest in DLESE. This overview is intended to provide you with very general information about DLESE and the library's organization. As always, we welcome your comments and suggestions. Please direct them to firstname.lastname@example.org . Browse the Library resources and collections What is DLESE? DLESE is the Digital Library for Earth System Education, a free resource that supports teaching and learning about the Earth system. DLESE's development was funded by the National Science Foundation and continues to be built by a distributed community of educators, students, and scientists to support Earth system education at all levels.