"What you ignore is that it was kept secret ..the public was not informed, ..."  That's complete nonsense.  Decisions by school boards are matters of public record.  I know that this has gone on for years, and I don't even live in Peel Region.  I've heard discussion of it on the news many times.
In fact, while I'm at it, the Lord's Prayer is not "banned" in schools.  Many schools have Christian clubs (ISCF, Pathfinders, etc.), and on club time, they can pray their teen-aged faces off.  It's simply that the Lord's Prayer is not used in 'official' activities.  The Muslim prayer accommodations are no different.  Muslim students, like Christian students, have the right to gather for prayer any time they want.