diff --git a/src/iterators/iterator.md b/src/iterators/iterator.md
index 0d370794..bfc3a46c 100644
--- a/src/iterators/iterator.md
+++ b/src/iterators/iterator.md
@@ -29,7 +29,7 @@ impl<'s> Iterator for SliceIter<'s> {
 }
 
 fn main() {
-    let slice = [2, 4, 6, 8].as_slice();
+    let slice = &[2, 4, 6, 8];
     let iter = SliceIter { slice, i: 0 };
     for elem in iter {
         println!("elem: {elem}");
diff --git a/src/methods-and-traits/methods.md b/src/methods-and-traits/methods.md
index a49ad15f..974ed3c4 100644
--- a/src/methods-and-traits/methods.md
+++ b/src/methods-and-traits/methods.md
@@ -9,12 +9,12 @@ Rust allows you to associate functions with your new types. You do this with an
 
 ```rust,editable
 #[derive(Debug)]
-struct Race {
+struct CarRace {
     name: String,
     laps: Vec<i32>,
 }
 
-impl Race {
+impl CarRace {
     // No receiver, a static method
     fn new(name: &str) -> Self {
         Self { name: String::from(name), laps: Vec::new() }
@@ -41,7 +41,7 @@ impl Race {
 }
 
 fn main() {
-    let mut race = Race::new("Monaco Grand Prix");
+    let mut race = CarRace::new("Monaco Grand Prix");
     race.add_lap(70);
     race.add_lap(68);
     race.print_laps();
diff --git a/src/references/slices.md b/src/references/slices.md
index bb4cb3cf..4ea60733 100644
--- a/src/references/slices.md
+++ b/src/references/slices.md
@@ -10,7 +10,7 @@ A slice gives you a view into a larger collection:
 
 ```rust,editable
 fn main() {
-    let mut a: [i32; 6] = [10, 20, 30, 40, 50, 60];
+    let a: [i32; 6] = [10, 20, 30, 40, 50, 60];
     println!("a: {a:?}");
 
     let s: &[i32] = &a[2..4];
diff --git a/third_party/rust-on-exercism/health-statistics.rs b/third_party/rust-on-exercism/health-statistics.rs
index b414e61a..a9ed8cdb 100644
--- a/third_party/rust-on-exercism/health-statistics.rs
+++ b/third_party/rust-on-exercism/health-statistics.rs
@@ -6,7 +6,7 @@ pub struct User {
     name: String,
     age: u32,
     height: f32,
-    visit_count: usize,
+    visit_count: u32,
     last_blood_pressure: Option<(u32, u32)>,
 }
 
@@ -35,7 +35,7 @@ impl User {
         let bp = measurements.blood_pressure;
         let report = HealthReport {
             patient_name: &self.name,
-            visit_count: self.visit_count as u32,
+            visit_count: self.visit_count,
             height_change: measurements.height - self.height,
             blood_pressure_change: match self.last_blood_pressure {
                 Some(lbp) => {