Go to groupoing buttion anad add a group on the student field (like the student id to avoid grouping on same last names)
go to insert summary (sigma sign)
the formula is
Maximum({table.datefield},{table.student})
Minimum({table.datefield},{table.student})
You have to replace the blue with the table and field name from your data set. The date field is the field you want maximum and minimum of and the student field is field you gropuped on (like the student ID)