Teachers ask me to change the default value of the number of students, shown on a report page, since it is very low now (10). AFAIK an average classroom contains about 25 students, the default value could be set to 30 as a quick and dirty hack.
/moodle/mod/quiz/report/overview/report.php, line 71
$pagesize = optional_param('pagesize', 10, PARAM_INT); => $pagesize = optional_param('pagesize', 30, PARAM_INT);
Better would be to be able to change that value in the modules setting.