diff --git a/_posts/2013-01-11-markup-html-tags-and-formatting.md b/_posts/2013-01-11-markup-html-tags-and-formatting.md
index cf172b2f..bbf634bb 100644
--- a/_posts/2013-01-11-markup-html-tags-and-formatting.md
+++ b/_posts/2013-01-11-markup-html-tags-and-formatting.md
@@ -1,5 +1,7 @@
 ---
 title: "Markup: HTML Tags and Formatting"
+header:
+  teaser: "markup-syntax-highlighting-teaser.jpg"
 categories:
   - Markup
 tags:
@@ -10,7 +12,7 @@ tags:
   - markup
 ---
 
-## Headings
+A variety of common markup showing how the theme styles them.
 
 # Header one
 
diff --git a/_posts/2013-05-22-markup-more-images.md b/_posts/2013-05-22-markup-more-images.md
index c21f5340..0b226abf 100644
--- a/_posts/2013-05-22-markup-more-images.md
+++ b/_posts/2013-05-22-markup-more-images.md
@@ -1,6 +1,8 @@
 ---
 title: "Markup: Another Post with Images"
 excerpt: "Examples and code for displaying images in posts."
+header:
+  teaser: "http://farm9.staticflickr.com/8426/7758832526_cc8f681e48_c.jpg"
 tags: 
   - sample post
   - images
diff --git a/_posts/2013-08-16-markup-syntax-highlighting.md b/_posts/2013-08-16-markup-syntax-highlighting.md
index 41b17998..16b54880 100644
--- a/_posts/2013-08-16-markup-syntax-highlighting.md
+++ b/_posts/2013-08-16-markup-syntax-highlighting.md
@@ -1,6 +1,8 @@
 ---
 title: "Markup: Syntax Highlighting"
 excerpt: "Post displaying the various ways of highlighting code in Markdown."
+header:
+  teaser: "markup-syntax-highlighting-teaser.jpg"
 tags: 
   - code
   - syntax highlighting
diff --git a/images/markup-syntax-highlighting-teaser.jpg b/images/markup-syntax-highlighting-teaser.jpg
new file mode 100644
index 00000000..3c5129ed
Binary files /dev/null and b/images/markup-syntax-highlighting-teaser.jpg differ