Hmmmm. First of all, there is * a lot* of evidence against it, and most of the people I know are not sure on the topic.

I however believe they went there.
They are teaching you in school that the whole moon thing is a myth? I would have serious reservations about that school.
I doubt they told her "They never went to the moon, its BS" they probably gave both opinions and both sides of the story. That would be the right thing to do as people do have a right to form their own opinions.