Here is an example of the feedback that was provided by the students to their peers after their Powerpoint presentations (I have corrected the grammar / spelling mistakes in the feedback):

Junya
You used your hands well, and smiled a lot. Good.
You interacted well with the audience, but you didn’t look around the class enough. Some people in the audience felt ignored. You need to look at all sides of the room so that everyone feels included.
You moved around a little too much. If you move around too much, people become distracted from what you are talking about. You need to find a balance between moving to maintain interest, and moving too much.
Your pronunciation was generally quite good, but you need to work on the /ae/ sound (as in Pack), and the /er/ sound (perfect).
Your intonation was good, and you spoke fluently and naturally.
You used humour very well to interact with your classmates, so that they felt interested and could understand your feeling well.
Your slides were both interesting and relevant. It was good that you put some humour into your slides, but still made sure that they showed the important points you wanted to make.