diff --git a/Readme.md b/Readme.md
index b03bbf5..cd5c715 100644
--- a/Readme.md
+++ b/Readme.md
@@ -8,24 +8,45 @@
 # SG20: Teaching Topics
 
 ## Modules:
+* [Compile-time programming](#compile-time-programming)
+* [Meta-error handling](#meta-error-handling)
 * [C++ object model](#c-object-model)
+* [Program design](#program-design)
 * [User-defined types](#user-defined-types)
 * [Functions](#functions)
 
+### Compile-time programming
+* [requires-clause](compile-time-programming/requires-clause.md)
+* [concepts](compile-time-programming/concepts.md)
+* [requires-expressions](compile-time-programming/requires-expressions.md)
+* [function-templates](compile-time-programming/function-templates.md)
+
+### Meta-error handling
+* [static_assert](meta-error-handling/static_assert.md)
+
 ### C++ object model
 * [rule-of-five](object-model/rule-of-five.md)
 * [constant-objects](object-model/constant-objects.md)
 * [special-member-functions](object-model/special-member-functions.md)
 * [declarations](object-model/declarations.md)
 * [objects](object-model/objects.md)
+* [constructors](object-model/constructors.md)
+* [pass-by-reference](object-model/pass-by-reference.md)
 * [types](object-model/types.md)
 * [copy-semantics](object-model/copy-semantics.md)
 * [rule-of-zero](object-model/rule-of-zero.md)
 * [move-semantics](object-model/move-semantics.md)
 
+### Program design
+* [concepts](compile-time-programmings/concepts.md)
+
 ### User-defined types
 * [user-defined-literals](functions/user-defined-literals.md)
 
 ### Functions
+* [defaulted-parameters](functions/defaulted-parameters.md)
+* [calling-functions](functions/calling-functions.md)
+* [pass-by-reference](object-model/pass-by-reference.md)
 * [user-defined-literals](functions/user-defined-literals.md)
+* [member-functions](functions/member-functions.md)
 
diff --git a/functions/pass-by-reference.md b/functions/pass-by-reference.md
new file mode 100644
index 0000000..f8338f6
--- /dev/null
+++ b/functions/pass-by-reference.md
@@ -0,0 +1 @@
+See [pass-by-reference](../object-model/pass-by-reference.md).
diff --git a/object-model/pass-by-reference.md b/object-model/pass-by-reference.md
new file mode 100644
index 0000000..7a2141c
--- /dev/null
+++ b/object-model/pass-by-reference.md
@@ -0,0 +1,90 @@
+# Module name: Passing parameters by reference
+_Skeleton instructions are typeset in italic text._
+
+## Overview
+
+_Provides a short natural language abstract of the module’s contents._
+_Specifies the different levels of teaching._
+
+<table>
+  <thead>
+    <th>Level</th>
+    <th>Objectives</th>
+  </thead>
+  <tr>
+    <td>Foundational</td>
+    <td></td>
+  </tr>
+  <tr>
+    <td>Main</td>
+    <td></td>
+  </tr>
+  <tr>
+    <td>Advanced</td>
+    <td></td>
+  </tr>
+</table>
+
+## Motivation
+
+_Why is this important?_
+_Why do we want to learn/teach this topic?_
+
+## Topic introduction
+
+_Very brief introduction to the topic._
+
+## Foundational: Using *
+
+### Background/Required Knowledge
+
+A student:
+
+
+### Student outcomes
+
+_A list of things "a student should be able to" after the curriculum._
+_The next word should be an action word and testable in an exam._
+_Max 5 items._
+
+A student should be able to:
+
+1.
+2.
+3.
+4.
+5.
+
+### Caveats
+
+_This section mentions subtle points to understand, like anything resulting in
+implementation-defined, unspecified, or undefined behavior._
+
+### Points to cover
+
+_This section lists important details for each point._
+
+## Main: implementing *
+
+### Background/Required Knowledge
+
+* All of the above.
+
+### Student outcomes
+
+A student should be able to:
+
+1.
+2.
+3.
+4.
+5.
+
+### Caveats
+
+### Points to cover
+
+## Advanced
+
+_These are important topics that are not expected to be covered but provide
+guidance where one can continue to investigate this topic in more depth._