diff --git a/_episodes/.gitkeep b/_episodes/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/_episodes_rmd/.gitkeep b/_episodes_rmd/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/_episodes_rmd/data/.gitkeep b/_episodes_rmd/data/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/_episodes_rmd/data/ReadMe.md b/_episodes_rmd/data/ReadMe.md
new file mode 100644
index 00000000..78ee740f
--- /dev/null
+++ b/_episodes_rmd/data/ReadMe.md
@@ -0,0 +1 @@
+Data that is needed to generate the episode files is placed into this directory.
diff --git a/_extras/.gitkeep b/_extras/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/code/.gitkeep b/code/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/code/ReadMe.md b/code/ReadMe.md
new file mode 100644
index 00000000..7ed56dc8
--- /dev/null
+++ b/code/ReadMe.md
@@ -0,0 +1 @@
+Code that is needed for the lesson content is placed into this directory.
diff --git a/data/.gitkeep b/data/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/data/ReadMe.md b/data/ReadMe.md
new file mode 100644
index 00000000..dfc11f2b
--- /dev/null
+++ b/data/ReadMe.md
@@ -0,0 +1 @@
+Data that is needed for the lesson content is placed into this directory.
diff --git a/fig/.gitkeep b/fig/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/files/.gitkeep b/files/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/files/ReadMe.md b/files/ReadMe.md
new file mode 100644
index 00000000..3fc9a2a2
--- /dev/null
+++ b/files/ReadMe.md
@@ -0,0 +1 @@
+Other files that are needed for the lesson content are placed into this directory.