1. Add a site option to require logon before showing the course menu. Brute force method: add require_logon() to the main index.php, below the is_admin() test.
2. When showing student his results for an ungraded quiz, include his raw score. Change is in mod/quiz/attempt.php:
if ($quiz->grade) { ...
}
else {
print_heading("strscore ... (copied from the graded quiz code_
}