In reply to Christina Beard
Re: Modifying quiz
{$a->নাম} - {$a->তারিখ} দ্বারা
You can have individual timings etc by going to the quiz, selecting user overrides and changing individual settings right now.
If you need to have a totally different quiz with different questions, etc. then create a second quiz and use groups and groupings to restrict access to a specific group of students.