For promoting Rpis in the context of schools, one has to wonder if the teachers are the first target.
Sure getting some enthusiastic support from teachers from that area might help in the process, but at least here in Germany the teachers are rather bound to the official curriculum and don't have that many holes to fill with additional stuff.
So either some sort of Programming lessons are already in place, which would suggest the existence of some computer hardware, or they would have to change the curriculum to add programming to the routine.
In both cases decisions higher up are in order to support a larger scale use of the rpi hardware (aside from some demos perhaps).
Sadly, what a teacher thinks or what an average person might qualify as reasonable has little or nothing to do with the decisions made in our school system.
( perhaps a bit cynic view but not far from the truth