 
     <BS.Row>
       <BS.Col xs={12}>
-        <label className='-exercises-section-label'>
+        <label className='exercises-section-label'>
           <ChapterSection section={section.chapter_section}/>. {section.title}
         </label>
       </BS.Col>

      memo.concat(renderInRows(exerciseCards))
    , [])

    <BS.Grid>
      {renderedExercises}
    </BS.Grid>



ExerciseCardMixin =
  renderAnswers: (answer) ->
    classes = ["answers-answer"]
    if answer.correctness is "1.0"
      classes.push("correct")

    <div className={classes.join(" ")}>
      <div className="answer-letter" />
      <ArbitraryHtmlAndMath className="answer" block={false} html={answer.content_html} />
    </div>
