             tooltip='Indicates how well students performed on system assigned problems' />
         </BS.Col>
       </BS.Row>
-      {chapters}
+      {for chapter, index in chapters
+        <DashboardChapter chapter={chapter} key={index} />}
     </BS.Panel>
 
 module.exports = CCDashboard

    courseId = @props.id
    periods = CCDashboardStore.getPeriods(courseId)
    chapters = CCDashboardStore.chaptersForDisplay(courseId, @state.activePeriodId)

    chapters = if _.any(chapters)
      for chapter, index in chapters
        <DashboardChapter chapter={chapter} key={index} />
    else
      <div>There are no completed concept coach tasks for this period.</div>

    courseDataProps = @getCourseDataProps(courseId)

    <BS.Panel {...courseDataProps} className='reading-stats tutor-booksplash-background'>

        initialActive={@props.initialActivePeriod}
        periods={periods}
        courseId={courseId} />
      <BS.Row className="column-legend">
        <BS.Col xs={2} xsOffset={6}>
          Complete
          <Icon type='info-circle'
