Representatives of the Coalition of Distinguished Language Centers, the Foreign Service Institute, and the Interagency Language Roundtable have begun maintaining an updated list of published works about learning and teaching to native-like levels of proficiency. To see the most current version of the list, click here
LangNet (www.langnet.org). Independent study lessons for all levels of proficiency, including Level 4.
RussNet (www.russnet.org). Reading and listening materials especially for Levels 3 and 4 proficiency.