diff --git a/src/hello-world.md b/src/hello-world.md
index 0a13ddeb..2c670155 100644
--- a/src/hello-world.md
+++ b/src/hello-world.md
@@ -35,6 +35,6 @@ Key points:
 
 * Macros being 'hygienic' means they don't accidentally capture identifiers from
   the scope they are used in. Rust macros are actually only
-  [partially hygenic](https://veykril.github.io/tlborm/decl-macros/minutiae/hygiene.html).
+  [partially hygienic](https://veykril.github.io/tlborm/decl-macros/minutiae/hygiene.html).
 
 </details>
diff --git a/src/running-the-course/course-structure.md b/src/running-the-course/course-structure.md
index e75da3f4..fe44905f 100644
--- a/src/running-the-course/course-structure.md
+++ b/src/running-the-course/course-structure.md
@@ -16,7 +16,7 @@ specialized topics:
 ### Android
 
 The [Android Deep Dive](../android.md) is a half-day course on using Rust for
-Android platform development. This includes interoperability wtih C, C++, and
+Android platform development. This includes interoperability with C, C++, and
 Java.
 
 You will need an [AOSP checkout][1]. Make a checkout of the [course
diff --git a/src/welcome.md b/src/welcome.md
index 7142cae5..98a0bff6 100644
--- a/src/welcome.md
+++ b/src/welcome.md
@@ -19,13 +19,13 @@ The first three days show you the fundamentals of Rust. Following this, you're
 invited to dive into one or more spezialized topics:
 
 * [Android](android.md): a half-day course on using Rust for Android platform
-  development (AOSP). This includes interoperability wtih C, C++, and Java.
+  development (AOSP). This includes interoperability with C, C++, and Java.
 * [Bare-metal](bare-metal.md): a full day class on using Rust for bare-metal
   (embedded) development. Both microcontrollers and application processors are
   covered.
 * [Concurrency](concurrency.md): a full day class on concurrency in Rust. We
   cover both classical concurrency (preemptively scheduling using threads and
-  mutextes) and async/await concurrency (cooperative multitasking using
+  mutexes) and async/await concurrency (cooperative multitasking using
   futures).