diff --git a/exercises/enums/enums1.rs b/exercises/enums/enums1.rs
index 2fcc8d92..a2223d33 100644
--- a/exercises/enums/enums1.rs
+++ b/exercises/enums/enums1.rs
@@ -1,12 +1,11 @@
 // enums1.rs
 // Make me compile! Execute `rustlings hint enums1` for hints!
 
+// I AM NOT DONE
+
 #[derive(Debug)]
 enum Message {
-   Quit,
-   Echo,
-   Move,
-   ChangeColor
+    // TODO: define a few types of messages as used below
 }
 
 fn main() {
diff --git a/exercises/enums/enums2.rs b/exercises/enums/enums2.rs
index bb46b048..ec32d952 100644
--- a/exercises/enums/enums2.rs
+++ b/exercises/enums/enums2.rs
@@ -1,12 +1,11 @@
 // enums2.rs
 // Make me compile! Execute `rustlings hint enums2` for hints!
 
+// I AM NOT DONE
+
 #[derive(Debug)]
 enum Message {
-    Move{x: i32, y: i32},
-    Echo(String),
-    ChangeColor(i32, i32, i32),
-    Quit
+    // TODO: define the different variants used below
 }
 
 impl Message {
diff --git a/exercises/enums/enums3.rs b/exercises/enums/enums3.rs
index c7ede650..178b40c4 100644
--- a/exercises/enums/enums3.rs
+++ b/exercises/enums/enums3.rs
@@ -1,11 +1,10 @@
 // enums3.rs
 // Address all the TODOs to make the tests pass!
 
+// I AM NOT DONE
+
 enum Message {
-    ChangeColor((u8, u8, u8)),
-    Echo(String),
-    Move(Point),
-    Quit,
+    // TODO: implement the message variant types based on their usage below
 }
 
 struct Point {
@@ -37,12 +36,7 @@ impl State {
     }
 
     fn process(&mut self, message: Message) {
-        match message {
-            Message::Move(point) => self.move_position(point),
-            Message::ChangeColor((r, g ,b)) => self.change_color((r, g ,b)),
-            Message::Echo(s) => self.echo(s),
-            Message::Quit => self.quit(),
-        }
+        // TODO: create a match expression to process the different message variants
     }
 }
 
diff --git a/exercises/modules/modules1.rs b/exercises/modules/modules1.rs
index 3535a36a..1a2bd0dd 100644
--- a/exercises/modules/modules1.rs
+++ b/exercises/modules/modules1.rs
@@ -1,13 +1,15 @@
 // modules1.rs
 // Make me compile! Execute `rustlings hint modules1` for hints :)
 
+// I AM NOT DONE
+
 mod sausage_factory {
     // Don't let anybody outside of this module see this!
     fn get_secret_recipe() -> String {
         String::from("Ginger")
     }
 
-    pub fn make_sausage() {
+    fn make_sausage() {
         get_secret_recipe();
         println!("sausage!");
     }