 Create a list of the lessons in this class along with a short description of each lesson.
These should be short and to the point. It should be clear from reading the summary whether someone
will want to jump to a lesson or not.--> 
 
<dl> 
  <dt><b><a href="efficient-network-access.html">Optimizing Downloads for Efficient Network Access</a></b></dt>
    <dd>This lesson introduces the wireless radio state machine, explains how your app’s connectivity model interacts with it, and how you can minimize your 