So you got the flowers past the guard at the front of her school? Great. And you found out her list of classes and classrooms. Now, you’d also need to coordinate with the flower delivery people in relation to the time they’ll actually be arriving. That way, when the flower person arrives, he knows which class she’s having and which classroom she’ll be in. Oh, and even if he got past the guard, that doesn’t mean he’ll be allowed all the way to the classroom.
He might end up having to deposit the precious flowers at the administrative office, or some other setup like that, so it’s just too bad about the intended dramatic effect because there won’t be any. Oh, and don’t forget that the day that the flowers are scheduled to be delivered just might be the day that classes get called off, or a field trip is set, or maybe she calls in sick. So good luck with that.