「Dipper先生、今日は何を教えてくれるの？」

= Dipper Sensei, kyou wa nani wo oshiete kureru no?

= Dipper Sensei, what are you going to teach us?

「今、何を教えるか考えているところです。」

= Ima, nani wo oshieru ka kangaete iru tokoro desu.

= I am thinking about what to teach now.