Diversity Learning K12 is a partnership between a number of respected researchers and practitioners in the ESL/EFL field, including Stephen Krashen and James Crawford. Here are some direct links to particularly useful pages on their website:

Presentations by Our Partners

Selected Articles by Our Partners

Recent Developments Affecting ELLs


Books by Our Partners

I’m adding these links to The Best Ways To Keep-Up With Current ELL/ESL/EFL News & Research.