Interval.md

@@ -19,7 +19,7 @@ add_column :courses, :duration, :interval
 
 ### Using it
 
-The column is automatically identified and the value is turn into `ActiveSupport::Duration`. So any of the methods available on it can be used direct from your field. [RubyOnRails Doc](http://api.rubyonrails.org/classes/ActiveSupport/Duration.html)
+The column is automatically identified and the value is turned into `ActiveSupport::Duration`. So, any of the methods available on it can be used directly from your field. [RubyOnRails Doc](http://api.rubyonrails.org/classes/ActiveSupport/Duration.html)
 ```ruby
 # Shows when you'll be finishing the course
 course.duration.from_now