From a friend of mine at Scholastic - here is some research on fifth grade reading comprehension.
"Results after two years of using three reading comprehension curricula show gains from one program and no effects for the other two on reading comprehension for fifth-graders, according to a study released by the National Center for Education Evaluation and Regional Assistance in the Institute of Education Sciences. The study focused on whether 5th grade students in disadvantaged schools could be helped in making the transition from "learning to read" to "reading to learn" by bolstering the vocabulary and comprehension skills that allow them to organize and acquire knowledge from text.
Three commercially available supplemental reading comprehension curricula were used for a second year by school and teachers to teach explicit reading comprehension strategies—ReadAbout, Read for Real, and Project CRISS. The study included 182 teachers and 61 schools in 10 districts, with study schools within each district assigned by lottery to use one of the curricula or serve as a control group."
If you want to set up your nonprofit for mobile donations, this is where you go. (from my new friend Ben Rigby introduced to me by Beth Kanter - a student and I were researching mobile giving for the netgened project.)