Late last year, we wondered why Microsoft was seemingly wasting its time bashing Chromebooks, the low-cost browser-based laptops that have barely registered in consumer sales figures. However, Fortune’s Michael Helft writes that Chromebooks have the potential to give Microsoft major headaches in one of its important markets: Schools. In particular, Helft says that his sons’ school district has started buying up Chromebooks instead of PCs and he says that they’re delivering some real advantages. “It’s not hard to see why our PTA and the school district opted for Chromebooks,” he explains. “Sure, they don’t have Office. But they do have the free Google Docs, which is an easy-to-use alternative and sufficient for most tasks required of elementary school students. As for