We don't anything about Ms. Porter's belief system, so how can we possibly judge it? I'm sure the police have talked to Ms. Porter and found out the real story here, which we don't know yet. Ms. Porter deserves the benefit of the doubt until we hear HER story. For all we know, it's Terri that caused the confusion, Terri that lied about what Ms. Porter said, and Terri tried her hardest to make this teacher look bad. And there could be an innocent explanation for what that one kid said. I'm going to wait to hear what Ms. Porter has to say before passing judgment on her.
Terri directed this entire tragedy and it's not fair that the players she involved should get the fallout when we don't even know their story yet.
ETA: I believe the seizures were to be part of the story Terri was going to spin as to why Kyron probably wandered off that day and more easily point the finger at the school for being negligent. She was going not to only come off as the loving and devastated stepmother, but she was going to trump the school, her way of saying that she was better than them and they weren't worthy of having her on staff if they were to hire her anyway. Unfortunately for her, this turned from a missing boy to a criminal investigation, and so she never got to tell this story to enhance her supermom abilities or thumb her nose at the school the way she wanted to.