diff --git a/doc/training-guides/training-cluster-by-script.xml b/doc/training-guides/training-cluster-by-script.xml
index cead1121..3026a8f9 100644
--- a/doc/training-guides/training-cluster-by-script.xml
+++ b/doc/training-guides/training-cluster-by-script.xml
@@ -16,7 +16,7 @@
     <title>To test scripts</title>
     <step>
       <title>Set up the test environment</title>
-      <para>To use VirtualBox as test environment, you must attach
+      <para>To use VirtualBox as a test environment, you must attach
         the following network adapters:</para>
       <itemizedlist>
         <listitem>
@@ -39,7 +39,7 @@
       <title>Test scripts individually</title>
       <para>Run the shell scripts in the <filename>Scripts</filename>
         folder to verify they run correctly. Do not install VirtualBox,
-        although it is recommended because your host machine might fail.</para>
+        even though it is recommended because your host machine might fail.</para>
       <para>To test the scripts, run them. Some scripts require
         input parameters. If you do not want to run them manually, run
         the <filename>Scripts/test_scripts.sh</filename> file. Virtual
@@ -51,7 +51,7 @@
       <para>You must install VirtualBox, Ubuntu Server 12.04 or
         13.04, and the VirtualBox guest add-ons.</para>
       <para>To install VirtualBox guest add-ons, complete one of
-        these steps:</para>
+        the below steps:</para>
       <itemizedlist>
         <listitem>
           <para>Install the VirtualBox guest add-ons through