ICT4Ha

Hi! I'm having kind of an issue over here. I am a teacher who likes to consecrate my students in the awesomeness of HTML and website building in common (also CMS like Wordpress or Joomla or Drupal or...). Is there a possibility that I can register a multitude of accounts? I tried registering my students in the class room, but they've got errors. I suppose the amount of registrations is automatically limited by IP adress? Your help would be very welcome! Thanks in advance.