diff --git a/pretext/IntroCpp/firstcppprogram.ptx b/pretext/IntroCpp/firstcppprogram.ptx
index 6be2ccd..10bb655 100644
--- a/pretext/IntroCpp/firstcppprogram.ptx
+++ b/pretext/IntroCpp/firstcppprogram.ptx
@@ -1,6 +1,7 @@
 <section xml:id="intro-cpp_let-s-look-at-a-c-program">
         <title>Let's look at a C++ program</title>
-        <p>A time honored tradition in computer science is to write a program
+        <introduction>
+<p>A time honored tradition in computer science is to write a program
             called <q>hello world.</q> The <q>hello world</q> program is simple and easy.
             No logic errors are possible to make, so getting it to run relies only on
             understanding the syntax. Let's look at an easy version of <q>hello world</q>
@@ -57,7 +58,8 @@ int main(){
             are some elements of C++ that will fade into the background as you
             become used to seeing them. One thing that will help you is to learn a
             little bit more about C++.</p>
-        <subsection xml:id="intro-cpp_compilation">
+        </introduction>
+<subsection xml:id="intro-cpp_compilation">
             <title>Compilation</title>
             <p>A question you may have about this little program is <q>How would I run it on
                 my own machine?</q> Running a C++ program is not as simple as running a
@@ -311,5 +313,4 @@ int main() {
 
 
         </subsection>
-    </section>
-    
+    </section>
\ No newline at end of file
diff --git a/pretext/IntroCpp/whylearncpp.ptx b/pretext/IntroCpp/whylearncpp.ptx
index 782cec5..67ce8d2 100644
--- a/pretext/IntroCpp/whylearncpp.ptx
+++ b/pretext/IntroCpp/whylearncpp.ptx
@@ -1,6 +1,7 @@
 <section xml:id="intro-cpp_why-learn-another-programming-language">
         <title>Why Learn Another Programming Language?</title>
-        <p>Python is a great language for beginning programming for several reasons.
+        <introduction>
+<p>Python is a great language for beginning programming for several reasons.
             First, the syntax is both sparse and clear. Second, the underlying model of
             how objects and variables work is very consistent. Third, you can write
             powerful and interesting programs without a lot of work. However, Python
@@ -31,7 +32,8 @@
             conditionals, and functions. And there are other language features that are unique. If
             you know what is common in most languages, then in learning a new language, you need only
             to focus on what is different from the languages you already know.</p>
-        <subsection xml:id="intro-cpp_why-learn-c-why-not-java-or-javascript">
+        </introduction>
+<subsection xml:id="intro-cpp_why-learn-c-why-not-java-or-javascript">
             <title>Why Learn C++? Why not Java or Javascript?</title>
             <blockquote>
                 <p><ul>
@@ -71,5 +73,4 @@
                 </ul></p>
             </blockquote>
         </subsection>
-    </section>
-
+    </section>
\ No newline at end of file