You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="Butcher_TableScreenShot2.jpg|1630" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1387" ns="0" title="Visual-Verbal Learning (Aleven &amp; Butcher Project)" />
      <page pageid="1602" ns="0" title="Visual-verbal integration" />
      <page pageid="1630" ns="0" title="Contiguous Representations for Robust Learning (Aleven &amp; Butcher)" />
      <page pageid="2028" ns="0" title="Social and Communicative Factors in Learning" />
      <page pageid="2286" ns="0" title="McLaren - The Assistance Dilemma And Discovery Learning" />
      <page pageid="2860" ns="0" title="Fluency Summer Intern Project 2011" />
    </pages>
  </query>
</api>