they have completed an attempt at the quiz. The text that is shown
can depend on the grade the student got.</p>
-<p>For example, if you type "Well done" into the first feedback box, type 40%
-in the first grade boundary box, and type "Please study this week's work again"
-in the second feedback box, then students who score 40% or better will see the
-"Well done" message, and students who score less than 40% will see the other message.</p>
+<p>For example, if you enter:</p>
+
+<p>Grade boundary: 100%<br />
+Feedback: Well done<br />
+Grade boundary: 40%<br />
+Feedback: Please study this week's work again<br />
+...<br />
+Grade boundary: 0%</p>
+
+<p>Then students who score between 100% and 40% will see the
+"Well done" message, and students who score between 39.99% and 0%
+will see the other message. That is, the grade boundaries define
+ranges of grades, and each feedback string is displayed to
+scores within the appropriate range.</p>
<p>The grade boundaries can be specified either as a percentage, for example "31.41%", or
as a number, for example "7". If your quiz is out of 10 marks, a grade boundary of 7 means