But does it matter that much...Most schools are using Win7 (or, sadly, Vista) at this point and I would wager most set IE as the default browser. As most educational networked software targets IE. Many of the 'secured' browser based exam companies base their model around IE. And most schools don't allow you to change the default browser (at least in a way that persists across logins)
At home, kids use iPads and Android phones, etc. Schools often provide a portal and children use that portal both out of habit and at the direction of their parents.
And as public institutions [under the US system] parents look to the schools both to provide proper resources for completing out of school assignments and are willing to assign blame for technological issues which are for practical matter beyond the school's control - i.e what comes across the student's browser while sitting at the kitchen table.
Outside the bubble, most people are not that tech savvy and the trend is toward passive use of browsing devices not managing plug-ins and maintaining browser side scripts. And outside the bubble, people use school websites as portals - the schools are setting them up that way.
Microsoft is marketing something simple - if you get advertizing you clicked on the wrong link. That can be explained to the principal, the teacher in the classroom, the student, their dad, and the president of the school board - and without much more than those literal words.
