Reworded "What is This?" paragraph

Tried to make it less confusing to somebody who has no idea what a
Scantron machine is.

website/home.tmpl

@@ -3,11 +3,11 @@
 <% template page_content() %>
 <h1>Freetron</h1>
 <h2>What is this?</h2>
-<p>Freetron is an open-source scantron software implementation allowing you grade
-a particular variant of bubble forms. If you want forms graded, follow the
-steps below. If you desire confidentiality, you can install this software
-(including this site) on your own computer from
-<a href="https://github.com/floft/freetron">Github</a>.</p>
+<p>You remember using those fill-in-the-bubble test forms for standardized
+tests in school that required #2 pencils? <i>Freetron</i> is open-source
+software that can grade a particular variant of these bubble forms. If you want
+to use these forms in your class but don't want to buy an expensive machine to
+grade them, follow the steps below.</p>
 
 <h2>Four Simple Steps</h2>
 <ol>