     else
       stem = stem.replace(/____/, '<input type="text" placeholder="fill this in" class="blank"/>')
 
-    <ArbitraryHtmlAndMath block=true className="stem" html={stem} />
+    <ArbitraryHtmlAndMath block=true className='stem' html={stem} />
 
   componentDidMount: ->
     # Find the input box and attach listeners to it

    isAnswered = !!config.answer

    if config.stimulus?
      stimulus = <ArbitraryHtmlAndMath block=true className="stimulus" html={config.stimulus} />
    classes = ['question', config.type]
    classes.push('answered') if isAnswered


      Type(props)


    <div className='exercise'>
      <ArbitraryHtmlAndMath className='stimulus' html={config.content.stimulus} />
      {questions}
    </div>

