The document describes a Japanese language lesson where the teacher proposed adjusting the classroom environment based on student feedback. When the lesson started, the blinds were open and it was too bright. The teacher asked "shall I close the blinds?" After closing the blinds, it became too dark, so the teacher asked "shall I turn on the lights?" However, then the room became too hot, so the teacher asked "shall I turn on the air conditioning?" The document explains that ~ましょうか means "shall I/let me ~" and is used to offer assistance to someone.