diff --git a/_modules.qmd b/_modules.qmd
index aa2eac2..271ad9d 100644
--- a/_modules.qmd
+++ b/_modules.qmd
@@ -1,18 +1,19 @@
 1. [Git, Pull Requests, and code reviews](01_version_control.qmd) [🛝](01_version_control_slides.html)
-    * [Discussion](group_work/module_01.md)
-    * [Homework](projects/data_cleaning/Project_module_01.md)
+    * [Discussion](group_work/01_module.md)
+    * [Homework](projects/data_cleaning/01_Project_module.md)
 2. [Python functions, classes, and modules](02_function_classes.qmd) [🛝](02_function_classes_slides.html)
-   *  [Discussion](group_work/module_02.md)
-    * [Homework](projects/data_cleaning/Project_module_02.md)
+   *  [Discussion](group_work/02_module.md)
+    * [Homework](projects/data_cleaning/02_Project_module.md)
 3. [Testing and auto-formatting](03_testing.qmd) [🛝](03_testing_slides.html)
-    * [Discussion](group_work/module_03.md)
-    * [Homework](projects/data_cleaning/Project_module_03.md)
+    * [Discussion](group_work/03_module.md)
+    * [Homework](projects/data_cleaning/03_Project_module.md)
 4. [Dependencies and GitHub actions](04_dependencies_ci.qmd) [🛝](04_dependencies_ci_slides.html)
-    * [Discussion](group_work/module_04.md)
-    * [Homework](projects/data_cleaning/Project_module_04.md)
+    * [Discussion](group_work/04_module.md)
+    * [Homework](projects/data_cleaning/04_Project_module.md)
 6. [Object oriented design in Python](05_oop.qmd) [🛝](05_oop_slides.html)
-    * [Homework](projects/data_cleaning/Project_module_06.md)
+    * [Discussion](group_work/05_module.md)
+    * [Homework](projects/data_cleaning/05_Project_module.md)
 6. [Documentation](06_documentation.qmd) [🛝](06_documentation_slides.html)
-    * [Homework](projects/data_cleaning/Project_module_05.md)
+    * [Homework](projects/data_cleaning/05_Project_module.md)
 7. [Distributing your package](07_packaging.qmd) [🛝](07_packaging_slides.html)
-    * [Homework](projects/data_cleaning/Project_module_07.md)
\ No newline at end of file
+    * [Homework](projects/data_cleaning/07_Project_module.md)
\ No newline at end of file
diff --git a/group_work/module_01.md b/group_work/01_module.md
similarity index 100%
rename from group_work/module_01.md
rename to group_work/01_module.md
diff --git a/group_work/module_02.md b/group_work/02_module.md
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rename from group_work/module_02.md
rename to group_work/02_module.md
diff --git a/group_work/module_03.md b/group_work/03_module.md
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rename from group_work/module_03.md
rename to group_work/03_module.md
diff --git a/group_work/module_04.md b/group_work/04_module.md
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rename from group_work/module_04.md
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diff --git a/group_work/05_module.md b/group_work/05_module.md
new file mode 100644
index 0000000..9d7c4e2
--- /dev/null
+++ b/group_work/05_module.md
@@ -0,0 +1,7 @@
+## Module 05
+
+- Q1: Explain in your own words: what is composition? and what is inheritance in software design? 
+- Q2: What are some pros and cons of composition and inheritance? 
+- Q3: How could you use composition and/or inheritance in your Cleaner classes? 
+
+{{< include _footer.md >}}
\ No newline at end of file
diff --git a/group_work/index.md b/group_work/index.md
index 843ddd1..4f24187 100644
--- a/group_work/index.md
+++ b/group_work/index.md
@@ -2,11 +2,11 @@
 
 Related to the time series cleaning project. 
 
-* [Module 1](module_01.md)
-* [Module 2](module_02.md)
-* [Module 3](module_03.md)
-* Module 4
-* Module 5
+* [Module 1](01_module.md)
+* [Module 2](02_module.md)
+* [Module 3](03_module.md)
+* [Module 4](04_module.md)
+* [Module 5](05_module.md)
 * Module 6
 * Module 7
 
diff --git a/projects/data_cleaning/Project_module_01.md b/projects/data_cleaning/01_Project_module.md
similarity index 100%
rename from projects/data_cleaning/Project_module_01.md
rename to projects/data_cleaning/01_Project_module.md
diff --git a/projects/data_cleaning/Project_module_02.md b/projects/data_cleaning/02_Project_module.md
similarity index 100%
rename from projects/data_cleaning/Project_module_02.md
rename to projects/data_cleaning/02_Project_module.md
diff --git a/projects/data_cleaning/Project_module_03.md b/projects/data_cleaning/03_Project_module.md
similarity index 100%
rename from projects/data_cleaning/Project_module_03.md
rename to projects/data_cleaning/03_Project_module.md
diff --git a/projects/data_cleaning/Project_module_04.md b/projects/data_cleaning/04_Project_module.md
similarity index 100%
rename from projects/data_cleaning/Project_module_04.md
rename to projects/data_cleaning/04_Project_module.md
diff --git a/projects/data_cleaning/Project_module_05.md b/projects/data_cleaning/05_Project_module.md
similarity index 100%
rename from projects/data_cleaning/Project_module_05.md
rename to projects/data_cleaning/05_Project_module.md
diff --git a/projects/data_cleaning/Project_module_06.md b/projects/data_cleaning/06_Project_module.md
similarity index 100%
rename from projects/data_cleaning/Project_module_06.md
rename to projects/data_cleaning/06_Project_module.md
diff --git a/projects/data_cleaning/Project_module_07.md b/projects/data_cleaning/07_Project_module.md
similarity index 100%
rename from projects/data_cleaning/Project_module_07.md
rename to projects/data_cleaning/07_Project_module.md