Is minecraft good to help kids with school work?

If it is for creativity, then yes. Other schoolwork. NO. It will not help them. They will possibly get addicted to the game. Try to limit their play times to the weekends.

Most of the time no, unless some weird concidence school work. It does not hurt, but mostly it don't help either.

Depends, some schools use it for architecture courses.

Or just for simple creativity, to get the kids to create and learn from it.

You could also use it for problem solving, and math if you set it up correctly.

Pretty much it's situational, but it can work.