members    = involvements.find(:all,
                                   :conditions => ['year=? AND type=? and user_id is not null', year, 'Member'],
                                   :include => [:user],
                                   :order => "users.last_name ASC, users.first_name ASC")

    volunteers = involvements.find(:all,
                                   :conditions => ['year=? AND type=? and user_id is not null', year, 'Volunteer'],
                                   :include => [:user],
                                   :order => "users.last_name ASC, users.first_name ASC")

    parents    = members.collect { |m| m.user.parents }.flatten.sort { |a, b| "#{a.last_name} #{a.first_name}" <=> "#{b.last_name} #{b.first_name}" }.uniq