If you are the girlfriend of a kindergarten teacher, you can talk about children. She is a girl and a kindergarten teacher. She must be a kind girl who likes children very much. You can talk to her about children, ask her what kind of children she likes, and ask her how to take care of them. This will show that you are very caring and like children, and she won't resent you. As for other topics, you can guess what she likes when chatting with her. Then we can talk again when we have a chance, but don't be too straightforward to find a topic. It's embarrassing. In fact, when two people have a good impression, they don't need to find a topic. Naturally, there are many topics. I hope you can catch up with her as soon as possible.