What kind of book are you going to select? Summer time. Schools are closed. You are a 5th grade ELA teacher. Local public library gives you a...

I would have to go with #3 in that list of selections. 
The idea being, both with ELA learners and their parents (usually also limited English
speakers) is to increase their understanding of the language and vocabulary and to give
them a love of reading.

Too often I think we view our jobs
as teachers as giving stduents everything they need to learn before they leave in the
12th grade.  It's a rather silly proposition.  Everyone continues to learn, what we are
is the survey course.  Sure, we can give them math and comprehension skills, but the
desire to learn on their own, plus their interest in our subjects, is at least as
important to their future intellectual growth.