According to the article in the Prophet, the school will be closed for two weeks while the building itself is inspected, teachers audited, additional teachers brought in, classes adjusted, and so on. All students were sent home on the train the morning after Harry’s run-in with Quirrell. The Educational Office is offering assistance to all families who wish for their children to transfer to a different European school, or who are switching to home-schooling. Harry himself is being moved to Beauxbatons, per his own request. He loves Hogwarts, but he’s not blind to its faults. This is a new life; he’s taking a new path. Hogwarts is being made better, yes, but it’s just not on Harry’s path this time around. Beauxbatons is his next adventure.