secret param to see possible attempts

app/views/questions/_question.html.haml

@@ -30,7 +30,8 @@
               %br
               %h5 Insufficient Responses
               %p No data is displayed for this question because of insufficient responses.
-              -#%p= "Responded: #{aggregated_responses.count}, Possible: #{@school.available_responders_for(question)}"
+              - if params.include?(:show_possible)
+                %p= "Responded: #{aggregated_responses.count}, Possible: #{@school.available_responders_for(question)}"
               %p= "Source: #{question.for_teachers? ? "Teachers" : "Students"}"
               %br