Teachers visiting Amanda at the hospital?

Watching Ep 4 now. One of the parents interviewed said that teachers visited Amanda in the hospital when her cancer returned. These are the things I don’t understand. I get how Amanda could go to an ER for example and take pics but how were people visiting her and not being able to tell she wasn’t in for cancer treatment? Same with the babysitter picking her up much earlier from her hospital room. These are the details that I don’t get.