diff --git a/course/templates/relative-grades.tpl b/course/templates/relative-grades.tpl
index f20811f..d64d564 100644
--- a/course/templates/relative-grades.tpl
+++ b/course/templates/relative-grades.tpl
@@ -8,8 +8,8 @@
 		<p>Below are visualizations of your advisee's relative performance in their classes, as compared to the other students' performance on each assignment.</p>
 		<ul>
 			<li>The black line is your advisee's grade.</li>
-			<li>The blue <span style="color: #9ddffe;">&#9608;</span> "river" represents the middle ground: the white line is the median score, and everyone "in the river" is within a standard deviation of the median.</li>
-			<li>The yellow <span style="color: #ffe399;">&#9608;</span> bank of the river represents scores more than a standard deviation below the median.</li>
+			<li>The blue <span style="color: #9ddffe;">&#9608;</span> "river" represents the middle ground: the white line is the median score, and everyone "in the river" is within one quartile of the median.</li>
+			<li>The yellow <span style="color: #ffe399;">&#9608;</span> bank of the river represents scores more than a quartile below the median.</li>
 			<li>The red <span style="color: #ff3f0c;">&#9608;</span> line represents the lowest score on each assignment.</li>
 			<li>The blue <span style="color: #6ed0ff;">&#9608;</span> line is the highest score on each assignment.</li>
 		</ul>