Evaluation system

منذ ٦ أعوام

Is it possible to change the evaluation system a little? before, practically 95% of my students used to complete the evaluation by stars, but I do not remember since which updated, they simply do not evaluate (or many of them don't!). 
I think that not only should it be shown on the screen when the class ends, but also that it should show some pop-out?, so the students would feel a little bit more committed to leaving an evaluation.