Live Animals...?

While not cutting edge technology, having live animals in the classroom is an important part of learning for biology.  One of the science standards involves teaching students how to properly care for living specimens.  One method to do this is to have young children raise animals within the classroom.  This website, http://www.naturenorth.com/spring/classrm/wfclass/Fclaswf.html provides information on how to raise wood frogs.  I personally believe that learning how to raise animals is an important part of any person's education.  Not only does it teach responsibility, but it also achieves the needs of the standard.  I would love to have my students raise frogs, which are generally low maintenance.  How do you feel about animals in the classroom?