'Return a list of `(points, max_points)` tuples representing
the scores in the specified chapter and section.
`chapter_index` and `section_index` start at 1.'

def _section_scores(self, chapter_index, section_index):

    score_css = '.chapters>section:nth-of-type({0})    .sections>div:nth-of-type({1})    .scores>dd'.format(chapter_index, section_index)
    text_scores = self.q(css=score_css).text
    return [tuple(map(int, score.split('/'))) for score in text_scores]
