If adopting 'best practice' is fraught with difficulties, and 'good practice' often noted but ignored, perhaps it is useful instead to look at 'worst practice'. The good news is that, in the area of ICT use in education, there appears to be a good deal of agreement about what this is!
Here's a list of some of what I consider to be the preeminent 'worst practices' related to the large scale use of ICTs in education in developing countries, based on first hand observation over the past dozen or so years.