This 28-page booklet, available online or as a printable PDF, is produced by The National Academies Press. It is based on the report Improving Adult Literacy Instruction: Options for Practice and Research, created by a committee of experts convened by the National Research Council at the request of the U.S. Department of Education to "synthesize research on literacy and learning in order to improve instruction for those served in adult education in the U.S."

Improving Adult Literacy Instruction: Developing Reading and Writing:

• "Presents an overview of what is known about how literacy develops the component skills of reading and writing"
• Presents an overview of "the practices that are effective for developing" those reading and writing component skills 
• "Describes principles of reading and writing instruction that can guide those who design and administer programs or courses to improve adult literacy skills"
• While "not intended as a how-to manual for instructors, teachers may also find the information presented here to be helpful as they plan and deliver instruction"

The above quoted text is from the description of Improving Adult Literacy Instruction: Developing Reading and Writing at https://www.nap.edu/catalog/13468/improving-adult-literacy-instruction-developing-reading-and-writing.