I don't have any issues with this and here's why:
The school's principal, Kirk Anderson, said notifications went to parents explaining the dog was going to be euthanized and that the experiment would be done with the dog's organs still functioning.
The parents were told ahead of time, so if any of them had a problem with it, they could have spoken up and kept their kid out of class that day.
The dog used in the experiment was going to be euthanized despite the class project.
Since the dog was going to be put down regardless, why not use it as a teaching tool?
I don't see what all the fuss is about. They knew ahead of time, and it wasn't like they just picked a dog off the street and killed it. I don't see an issue here.
That's how I saw it too. It's not like the teacher picked up a dog on the street before class and forced his students to watch him torture it or anything.
And WTF is up with the title of the article? Why should any parents be outraged? Any parents who had students in the class easily could have had the student excused, and any parent without one has no right to be outraged.