The rest of the article is actually pretty interesting. It sounds like there wasn't a clear plan (or at least the teachers weren't onboard) about how to work these into the classroom. OLPC had this problem too - tech people thought you could just hand out shiny things and everything would work out. It frequently doesn't work like this in the education setting. To be clear, BBC:Micro bit is really neat, and I think it will be useful, but it seems like figuring out how to effectively use stuff like this in the classroom continues to be a hard problem.