Professional organizations in your area of teaching certification publish journals covering research and best practices--an excellent way to learn from practicing teachers and peer reviewed research.
Below are some examples:
American Council on the Teaching of Foreign Languages http://www.actfl.org/
The American Council on the Teaching of Foreign Languages (ACTFL) is the only national organization dedicated to the improvement and expansion of the teaching and learning of all languages at all levels of instruction. ACTFL is an individual membership organization of more that 12, 000 foreign language educators and administrators from elementary through graducate education, as well as government and industry.
Nataional Foreign Language Center http://www.nflc.org/
The National Foreign Language Center (NFLC) is dedicated to promoting a language-competent society by developing and disseminating information that informs policy makers. The mission of the NFLC is to improve the capacity of the U.S. to communicate in languages other than English. We implement that mission through intensive and innovative strategic planning and development with globalized institutions, organizations, and enterprises throughout the United States. (NFLC)
New York City Public Schools http://schools.nyc.gov
The New York City Public Schools site provides information for parents, students, employees, and community members searching for information about the school system and its schools.
Gotham Schools http://gothamschools.org/
GothamSchools is an independent news source about the New York City public schools. (Gotham Schools)
School Book http://www.nytimes.com/schoolbook/
News, data and conversation about schools in New York City.
Inside Schools http://insideschools.org/
Insideschools offers news, school reviews and information about public education for New York City's diverse populations.
OhioLINK Foreign Language videos http://dmc.ohiolink.edu/cgi/i/image/image-idx?page=index;c=forglv
Foreign Language Video Instruction is a collection of video clips in which native speakers elaborate on a wide variety of topics about their culture, family, daily life, and more. Each video clip is accompanied by a description of its contents, the country of the speaker, and additional grammar and vocabulary notes.