diff --git a/Sd1/swd1.xml b/Sd1/swd1.xml
index 40efb9d9a95f7483052715d53ec764d761303c42..25582b25da0a6bf29a9c6c49210fbd6b446b807d 100644
--- a/Sd1/swd1.xml
+++ b/Sd1/swd1.xml
@@ -2081,7 +2081,21 @@ public class Fraction {
   <chapter xml:id="sd1L7">
     <title>Lecture 7</title>
 
-    <para/>
+    <section xml:id="sd1CrabsFinish">
+      <title>Preparations</title>
+
+      <itemizedlist>
+        <listitem>
+          <para>Read the remaining chapter 2 from <xref
+          linkend="bibHorton2011"/> excluding the <quote>Bitwise
+          Operations</quote> section.</para>
+        </listitem>
+
+        <listitem>
+          <para>Read chapter 4 of <xref linkend="bibKoelling2010Ger"/>.</para>
+        </listitem>
+      </itemizedlist>
+    </section>
   </chapter>
 
   <chapter xml:id="ideas">