Questions bank with open ended question

Hi,

      I have a questions bank with 42 questions. I want to show only one question at the time. All questions are open ended question (essay). I would like to validate when user click on a button and show the right answer with some informations. I added some layer to show the informations, but the validation take forever.

Unfortunatly, I can't answer all the questions because, it's draw the same question again and again.

 

Can anyone could help me please?