Research findings of the benefits of studying a second language. Benefits include: academic progress in other subjects; narrowing of achievement gaps; development of basic skills; higher-order, abstract and creative thinking; and more.

Should students who are learning English spend the school day in classes where only English is spoken? Or should they be taught reading and other academic skills and content in their native language? These are just a couple of the important questions surrounding effective practices for teaching ELLs.

The Guiding Principles are organized into seven strands, reflecting the major dimensions of program planning and implementation: (1) Assessment and Accountability; (2) Curriculum; (3) Instruction; (4) Staff Quality and Professional Development; (5) Program Structure; (6) Family and Community; and (7) Support and Resources.