diff --git a/source/guide.html.haml b/source/guide.html.haml
index ae665dc..bb3d078 100644
--- a/source/guide.html.haml
+++ b/source/guide.html.haml
@@ -11,7 +11,7 @@ title: Sass Basics
 - content_for :complementary do
   %h3 Topics
   %ul.anchors
-    %li= link_to "Pre-processing", "#topic-1"
+    %li= link_to "Preprocessing", "#topic-1"
     %li= link_to "Variables",     "#topic-2"
     %li= link_to "Nesting",       "#topic-3"
     %li= link_to "Partials",      "#topic-4"
@@ -23,7 +23,7 @@ title: Sass Basics
 %ul.slides
   %li#topic-1
     :markdown
-      ## Pre-processing
+      ## Preprocessing
 
       CSS on its own can be fun, but stylesheets are getting larger, more complex, and harder to maintain. This is where a preprocessor can help. Sass lets you use features that don't exist in CSS yet like variables, nesting, mixins, inheritance and other nifty goodies that make writing CSS fun again.
 
diff --git a/source/libsass.html.haml b/source/libsass.html.haml
index de15917..007839f 100644
--- a/source/libsass.html.haml
+++ b/source/libsass.html.haml
@@ -16,7 +16,7 @@ title: libSass
 
   LibSass is just a library. To run the code locally (i.e. to compile your stylesheets), you need an implementer, or "wrapper". There are a number of other wrappers for LibSass. We encourage you to write your own wrapper - the whole point of Libsass is that we want to bring Sass to many other languages, not just Ruby!
 
-  Below is are the libSass wrappers that we're currently aware of. Sometimes there are multiple wrappers per language – in those cases, we put the most recently-updated wrapper first.
+  Below are the libSass wrappers that we're currently aware of. Sometimes there are multiple wrappers per language – in those cases, we put the most recently-updated wrapper first.
 
 %ul.slides
   %li#sassc