use strict; use warnings;
use CGI;

# do some other stuff.....


# either functional style...
my @students = param('student[]');

# OR OO-style...
my $query = CGI->new;
my @students = $query->param('student[]'); 

# OR Gangnam-style.....
# no just kidding :-)


# now process your student input,
# remember to check no one is sending you weird data .....

foreach my $student (@students) {
   # wibble
}