Miguel Guhlin says:

When technology is missing from the equation, both during preparation of an initiative (e.g. Writing Workshop, Problem-Based Learning, whatever), then later when it is shared, adding technology after the fact results in a waste of money. Efforts like mass inclusion of tablets, Bring Your Own Device, Chromebooks fail, not because the devices themselves are insufficient or inadequate to the task, but because they are add-ons to the original recipe … and they were never meant to be included.

via http://www.mguhlin.org/2013/12/plurality-of-diversity-gcouros.html