What concerns would you have if a colleague intended to take a universalistic approach to comparing different ways in which iPads and other mobile devices could be used to teach middle-school students...

What concerns would you have if a colleague intended to take a universalistic approach to comparing different ways in which iPads and other mobile devices could be used to teach middle-school students algebra in several urban and suburban schools that are known to differ by social class? What recommendations would you give this researcher about her intended study?