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>
    <allredirects garcontinue="Problemlösendes_Unterrichten|22" />
  </query-continue>
  <query>
    <pages>
      <page pageid="44" ns="0" title="Auf kognitives Entwicklungsniveau abgestimmte Programme" />
      <page pageid="101" ns="0" title="Lernen sichtbar machen (2013)" />
      <page pageid="387" ns="0" title="Hattie-Wiki - Konventionen" />
      <page pageid="404" ns="0" title="Charter schools" />
      <page pageid="407" ns="0" title="Common Language Effect" />
      <page pageid="524" ns="0" title="Intrinsischer Motivation" />
      <page pageid="526" ns="0" title="Extrinsischer Motivation" />
      <page pageid="534" ns="0" title="Mnemotechnischen Schlüsselwörter" />
      <page pageid="586" ns="0" title="Fokusgruppe" />
      <page pageid="648" ns="0" title="Computer-Literacy" />
    </pages>
  </query>
</api>