diff --git a/koans/about_constants.rb b/koans/about_constants.rb
index 0beccdc..006f1c0 100644
--- a/koans/about_constants.rb
+++ b/koans/about_constants.rb
@@ -67,7 +67,7 @@ class AboutConstants < EdgeCase::Koan
   end
 
   # QUESTION: Which has precedence: The constant in the lexical scope,
-  # or the constant from the inheritance heirarachy?
+  # or the constant from the inheritance hierarchy?
 
   # ------------------------------------------------------------------
 
diff --git a/koans/about_modules.rb b/koans/about_modules.rb
index cd967a9..8b56b65 100644
--- a/koans/about_modules.rb
+++ b/koans/about_modules.rb
@@ -42,7 +42,7 @@ class AboutModules < EdgeCase::Koan
     assert_equal __, fido.bark
   end
 
-  def test_module_methods_are_also_availble_in_the_object
+  def test_module_methods_are_also_available_in_the_object
     fido = Dog.new
     assert_nothing_raised(Exception) do
       fido.set_name("Rover")
diff --git a/koans/about_symbols.rb b/koans/about_symbols.rb
index 6133faa..f4a4319 100644
--- a/koans/about_symbols.rb
+++ b/koans/about_symbols.rb
@@ -84,7 +84,7 @@ class AboutSymbols < EdgeCase::Koan
   # interesting string operations are available on symbols.
 
   def test_symbols_cannot_be_concatenated
-    # Exceptions will be pondered further father down the path
+    # Exceptions will be pondered further farther down the path
     assert_raise(___) do
       :cats + :dogs
     end