I can't really hear what other students are talking about. Could you please summarize what they are saying?
I can't make out what anyone is saying. Can you paraphrase what they have said?
ーI can't really hear what other students are talking about. Could you please summarize what they are saying?
「他の生徒が話していることがよく聞こえないので、言っていることを要約してもらえませんか?」
to summarize で「要約する」
ーI can't make out what anyone is saying. Can you paraphrase what they have said?
「みんなの言っていることが聞き取れないので、言ったことを言い換えてもらえませんか?」
to make out で「聞き取る」
to paraphrase で「言い換える」
ご参考まで!
Could you summarize what the student said for me?
Could you briefly tell me what the student said?
Could you give me a quick summary of what the student said?"
この場合の「生徒がしゃべった内容を要約して教えてください」は、英語では
summarize(要約する)
briefly tell me(簡単に教える)
give me a quick summary(手短に要約を教える)
を使うと自然に言えます。