diff --git a/actionpack/lib/action_controller/metal/redirecting.rb b/actionpack/lib/action_controller/metal/redirecting.rb
index b8a80eef31..8de57f9199 100644
--- a/actionpack/lib/action_controller/metal/redirecting.rb
+++ b/actionpack/lib/action_controller/metal/redirecting.rb
@@ -83,7 +83,7 @@ module ActionController
     #
     # ==== Options
     # * <tt>:fallback_location</tt> - The default fallback location that will be used on missing `Referer` header.
-    # * <tt>:allow_other_host</tt> - Allows or dissallow redirection to the host that is different to the current host
+    # * <tt>:allow_other_host</tt> - Allows or disallow redirection to the host that is different to the current host
     #
     # All other options that can be passed to <tt>redirect_to</tt> are accepted as
     # options and the behavior is identical.
diff --git a/actionview/lib/action_view/helpers/tag_helper.rb b/actionview/lib/action_view/helpers/tag_helper.rb
index a64d7e396e..a6cec3f69c 100644
--- a/actionview/lib/action_view/helpers/tag_helper.rb
+++ b/actionview/lib/action_view/helpers/tag_helper.rb
@@ -166,7 +166,7 @@ module ActionView
       # This may come in handy when using jQuery's HTML5-aware <tt>.data()</tt>
       # from 1.4.3.
       #
-      #   tag.div data: { city_state: %w( Chigaco IL ) }
+      #   tag.div data: { city_state: %w( Chicago IL ) }
       #   # => <div data-city-state="[&quot;Chicago&quot;,&quot;IL&quot;]"></div>
       #
       # The generated attributes are escaped by default. This can be disabled using
diff --git a/actionview/lib/action_view/test_case.rb b/actionview/lib/action_view/test_case.rb
index 93be2be2d1..e1cbae5845 100644
--- a/actionview/lib/action_view/test_case.rb
+++ b/actionview/lib/action_view/test_case.rb
@@ -270,7 +270,7 @@ module ActionView
         begin
           routes = @controller.respond_to?(:_routes) && @controller._routes
         rescue
-          # Dont call routes, if there is an error on _routes call
+          # Don't call routes, if there is an error on _routes call
         end
 
         if routes &&
@@ -286,7 +286,7 @@ module ActionView
         begin
           routes = @controller.respond_to?(:_routes) && @controller._routes
         rescue
-          # Dont call routes, if there is an error on _routes call
+          # Don't call routes, if there is an error on _routes call
         end
 
         routes &&
diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb
index a2439e6ec7..ac1070e65b 100644
--- a/activerecord/lib/active_record/callbacks.rb
+++ b/activerecord/lib/active_record/callbacks.rb
@@ -240,7 +240,7 @@ module ActiveRecord
   #
   #     private
   #
-  #     def log_chidren
+  #     def log_children
   #       # Child processing
   #     end
   #
@@ -265,7 +265,7 @@ module ActiveRecord
   #
   #     private
   #
-  #     def log_chidren
+  #     def log_children
   #       # Child processing
   #     end
   #