"Students develop better when they are motivating each other with friends than with a teacher."
"Students develop better when they are stimulating each other with friends than with a teacher."
"students" 「生徒は」
"develop better" 「方が成長できる」
"when they are motivating each other with friends" 「友達と刺激し合う」
"than with a teacher" 「先生よりも」
[刺激し合う](https://eikaiwa.dmm.com/uknow/questions/37319/)についてもっと詳しく知りたい方はクリックしてください。
It's much more rewarding and enhancing towards personal growth when students motivate each other rather than with a teacher.
ご質問ありがとうございます。
「生徒は[先生](https://eikaiwa.dmm.com/uknow/questions/36364/)よりも友達と刺激し合う方が成長できる」と言いたいなら、英語で「It's much more rewarding and enhancing towards personal growth when students motivate each other rather than with a teacher.」と言えます。
ご参考になれば幸いです。
オーストラリア 
アメリカ合衆国 
