1. Teach a set of academic vocabulary words intensively across several days using a variety of instructional activities;
2. Integrate oral and written English language instruction into content-area teaching;
3. Provide regular, structured opportunities to develop written language skills; and
4. Provide small-group instructional intervention to students struggling in areas of literacy and English language development
The recommendations are rather broad, and are constrained to the extent that the panel was only able to consult findings from studies that conformed to standards for experimental, or quasi-experimental, research set by the What Works Clearinghouse. So there is much more research out there that might help fill out these recommendations (or add to them) that was not included in the report. Still, the focus is squarely on the role of language, paying strong attention to the need to ELs to have opportunities to USE language in spoken and written form and not just listen to it. The guide is freely available here.