Teach English All Day in All Classes for ELLs

The Tracy school district (17,530) in California is largely Hispanic and students with poor language skills have consistently lagged behind their peers in academic subjects  The traditional approach had been only one language skills period per day which hadn't improved student achievement.  Starting last year, all teachers in all subjects were trained to infuse their classes with literacy lessons.  Other districts across the country are trying similar strategies, integrating language skills in all classes.  What do you think about this here in Milwaukee where we have large numbers of ELL students?
Be sure to read the many comments.

Making English Part of the Fabric - School Districts Try New Approaches in Teaching Foreign-Language Speakers ad Achievement Requirements Get Tougher.  Vauhini Vara. 8.24.12.  The Wall Street Journal - Education
http://online.wsj.com/article/SB10000872396390443713704577603980738740256.html