diff --git a/source/proteus/proteus-1-1.xml b/source/proteus/proteus-1-1.xml
new file mode 100644
index 000000000..d9745a735
--- /dev/null
+++ b/source/proteus/proteus-1-1.xml
@@ -0,0 +1,128 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!-- **********************************************************************-->
+<!-- Copyright 2012-2026                                                  -->
+<!-- Matthew Boelkins                                                      -->
+<!--                                                                       -->
+<!-- This file is part of Active Calculus.                                 -->
+<!--                                                                       -->
+<!-- Permission is granted to copy, distribute and/or modify this document -->
+<!-- under the terms of the Creative Commons BY-SA license.  The work      -->
+<!-- may be used for free by any party so long as attribution is given to  -->
+<!-- the author(s), the work and its derivatives are used in the spirit of -->
+<!-- "share and share alike".  All trademarks are the registered marks of  -->
+<!-- their respective owners.                                              -->
+<!-- **********************************************************************-->
+<exercises component="proteus" xmlns:xi="http://www.w3.org/2001/XInclude" xml:id="proteus-1-1">
+<title>PROTEUS exercises</title>
+    <p>
+    In part <xref ref="PA-1-1" text="type-global"/>, you explored the velocity of a ball at various times.  Answer the following questions to explore other rates of change.
+    </p>
+    <exercise component="proteus" label="proteus-rates-o-change"  xml:id="proteus-rates-o-change" attachment="yes">
+        <p>
+        For each of the following scenarios, specify the independent (input) and dependent (output) variables, along with possible units for both.  Then give units for the rate of change.
+        </p>
+        <ol>
+            <li>
+                <p>
+                The population of a city changes over time.
+                    <ol>
+                        <li>
+                            <p>
+                            Independent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Dependent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Rate of change: <response />
+                            </p>
+                        </li>
+                    </ol>
+                </p>
+            </li>
+            <li>
+                <p>
+                As a weather balloon rises, the temperature of the air inside (and outside) the balloon decreases.
+                    <ol>
+                        <li>
+                            <p>
+                            Independent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Dependent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Rate of change: <response />
+                            </p>
+                        </li>
+                    </ol>
+                </p>
+
+            </li>
+            <li>
+                <p>
+                For a given trip (i.e. a set distance) as the speed of the car increases, the travel time decreases.
+                    <ol>
+                        <li>
+                            <p>
+                            Independent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Dependent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Rate of change: <response />
+                            </p>
+                        </li>
+                    </ol>
+                </p>
+
+            </li>    
+            <li>
+                <p>
+                As the population of a city decreases, the tax revenue of the city also decreases.
+                    <ol>
+                        <li>
+                            <p>
+                            Independent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Dependent: <response />
+                            </p>
+                        </li>
+                        <li>
+                            <p>
+                            Rate of change: <response />
+                            </p>
+                        </li>
+                    </ol>
+                </p>
+            </li>
+        </ol>
+
+    </exercise>
+
+
+    <exercise component="proteus" label="proteus-example-roc"  xml:id="proteus-example-roc" attachment="yes">
+
+        <p>
+        Give your own example of a quantity that changes over time, the units of the independent and dependent variables, and units of the rate of change.
+        </p>
+          <response />
+
+    </exercise>
+</exercises>
\ No newline at end of file
diff --git a/source/sec-1-1-vel.xml b/source/sec-1-1-vel.xml
index 5be19ed2f..6ac05b781 100644
--- a/source/sec-1-1-vel.xml
+++ b/source/sec-1-1-vel.xml
@@ -51,9 +51,11 @@
     </p>
 
     <xi:include href="./previews/PA-1-1-WW.xml" />
-<xi:include href="./previews/PA-1-1.xml" />
+    <xi:include href="./previews/PA-1-1.xml" />
   </introduction>
 
+    <xi:include href="./proteus/proteus-1-1.xml" />
+
   <subsection permid="iwq">
     <title>Position and average velocity</title>
     <p permid="Pnt">