for i in /export/home/student* 
do
  echo $i
  for j in `ls -a $i | 
    sed '/^.$/d' | 
    sed '/^..$/d' | 
    sed '/^.profile$/d' |
    sed '/^local./d' |
    sed '/^Documents$/d' |
    sed '/^Desktop$/d'        `
  do
    rm -r "$i/$j"
  done
done