http://eric-web.tc.columbia.edu/pathways/immigrant_issues/imeduc.html
A clearinghouse for urban students, their families and teachers, this site offers expansive discussions that face all immigrants and refugees.  This includes everything from economic statistics detailing immigrant contributions to the U.S. economy and discussions about immersion education.  Excellent in-depth articles and highlights of current bilingual research.

http://www.nea.org/issues/bilingual/resources.html
The National Education Association (NEA) summarizes issues and resources about bilingual education teaching methods and policy debates.

http://www.edweek.org/context/topics/biling.htm
"Education Week" on the web offers a detailed report on bilingual education teaching methods.  This site describes various methods such as dual immersion, transitional, maintenance, and others.  The original objective of bilingual education was to ensure that students would not fall behind academically because of poor command of English, and to gradually teach them English as a second language.  However, there are many approaches to making this happen.

http://www-bcf.usc.edu/~genzuk/Ramirez_informe.html
Analisis del informe final estudio longitudinal de la estrategia para la inmersion estructurada en el ingles, reclasificacion temprana y reclasificacion tardia de los programas de transicion en educacion bilingue para los estudiantes de idioma minoritario.