To view the details of a specific student, you can either tap on the small magnifying glass on the top left to search for a name or double-tap on a student in your current class. This will then show you that student's timetable and their form class.
If you tap on Other Information, you'll then see the contact info for that student's parents or guardians. You'll also be notified of any medical or dietary information that you need to know for that child.