diff --git a/lectures/week_03/images/allison_horst_cases.png b/lectures/week_03/images/allison_horst_cases.png
new file mode 100644
index 0000000..2374c61
Binary files /dev/null and b/lectures/week_03/images/allison_horst_cases.png differ
diff --git a/lectures/week_03/lec_09_working_with_data.Rmd b/lectures/week_03/lec_09_working_with_data.Rmd
index e39727e..bcdcf58 100644
--- a/lectures/week_03/lec_09_working_with_data.Rmd
+++ b/lectures/week_03/lec_09_working_with_data.Rmd
@@ -83,6 +83,21 @@ Choose good names
| obs_01 | first_obs | 1st Obs. |
+## An aside on cases in coding
+
+![](images/allison_horst_cases.png){ width=80% }
+
+
+## The janitor package handles suboptimal column names
+
+* The [janitor](https://www.rdocumentation.org/packages/janitor/versions/2.2.1) package has an extremely useful function called `clean_names()` which will handle all of your gross header names for you
+
+* From the `clean_names()` documentation:
+
+
+
+
The janitor package has an extremely useful function called clean_names()
which will handle all of your gross header names for you
From the clean_names()
documentation:
No empty cells – use NA
or some other placeholder