Examples of using "先生は何も言わずに、生徒がどのぐらい参加するか、議論に何を付け加えるか、さらには、生徒が議論の主導権をとるかどうかに関して、評価をつけたりします。" in a sentence and their english translations:
The teacher may say nothing, grading the students on how much they participate, what they add to the discussion, and their leadership of it.