Final answer:
To best scaffold nonfiction reading for beginning English-language learners, a middle school Language Arts teacher should provide glossaries with key terms, blank graphic organizers, and sentence stems for note-taking and summarizing.
Step-by-step explanation:
To scaffold the reading of nonfiction texts for English-language learners at the beginning level of English-language proficiency, a middle school Language Arts teacher would be best served by providing glossaries that list key terms found in the reading text. This approach directly supports the students' understanding of the content by equipping them with the necessary vocabulary to comprehend the material they are reading. Additionally, the teacher could utilize blank graphic organizers to help students categorize ideas, and provide sentence stems for note-taking and summarizing after reading to further support the students' language development and comprehension.